diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index dd565c8..7a4dd45 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,12 +11,12 @@ jobs:
 
     steps:
       - name: Check out code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Use Node.js
-        uses: actions/setup-node@v2
+        uses: actions/setup-node@v4
         with:
-          node-version: 16
+          node-version: 20
 
       - name: Install dependencies
         run: npm ci
diff --git a/Dockerfile b/Dockerfile
index c6f368a..eee9d60 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Specify the base image
-FROM node:lts
+FROM node:20
 
 # Set the working directory in the container
 WORKDIR /usr/src/app
diff --git a/package-lock.json b/package-lock.json
index a86cea9..1310c08 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,13 +9,10 @@
       "version": "1.0.0",
       "license": "ISC",
       "dependencies": {
-        "dotenv": "^16.4.5",
         "express": "^4.18.3"
       },
       "devDependencies": {
-        "node-fetch": "^3.3.2",
         "nodemon": "^3.1.0",
-        "supertest": "^6.3.4",
         "vitest": "^1.3.1"
       }
     },
@@ -586,17 +583,6 @@
       "integrity": "sha512-/kYRxGDLWzHOB7q+wtSUQlFrtcdUccpfy+X+9iMBpHK8QLLhx2wIPYuS5DYtR9Wa/YlZAbIovy7qVdB1Aq6Lyw==",
       "dev": true
     },
-    "node_modules/@types/node": {
-      "version": "20.11.25",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-20.11.25.tgz",
-      "integrity": "sha512-TBHyJxk2b7HceLVGFcpAUjsa5zIdsPWlR6XHfyGzd0SFu+/NFgQgMAl96MSDZgQDvJAvV6BKsFOrt6zIL09JDw==",
-      "dev": true,
-      "optional": true,
-      "peer": true,
-      "dependencies": {
-        "undici-types": "~5.26.4"
-      }
-    },
     "node_modules/@vitest/expect": {
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/@vitest/expect/-/expect-1.3.1.tgz",
@@ -625,33 +611,6 @@
         "url": "https://opencollective.com/vitest"
       }
     },
-    "node_modules/@vitest/runner/node_modules/p-limit": {
-      "version": "5.0.0",
-      "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-5.0.0.tgz",
-      "integrity": "sha512-/Eaoq+QyLSiXQ4lyYV23f14mZRQcXnxfHrN0vCai+ak9G0pp9iEQukIIZq5NccEvwRB8PUnZT0KsOoDCINS1qQ==",
-      "dev": true,
-      "dependencies": {
-        "yocto-queue": "^1.0.0"
-      },
-      "engines": {
-        "node": ">=18"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/sindresorhus"
-      }
-    },
-    "node_modules/@vitest/runner/node_modules/yocto-queue": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/yocto-queue/-/yocto-queue-1.0.0.tgz",
-      "integrity": "sha512-9bnSc/HEW2uRy67wc+T8UwauLuPJVn28jb+GtJY16iiKWyvmYJRXVT4UamsAEGQfPohgr2q4Tq0sQbQlxTfi1g==",
-      "dev": true,
-      "engines": {
-        "node": ">=12.20"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/sindresorhus"
-      }
-    },
     "node_modules/@vitest/snapshot": {
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/@vitest/snapshot/-/snapshot-1.3.1.tgz",
@@ -732,6 +691,18 @@
         "node": ">=0.4.0"
       }
     },
+    "node_modules/ansi-styles": {
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-5.2.0.tgz",
+      "integrity": "sha512-Cxwpt2SfTzTtXcfOlzGEee8O+c+MmUgGrNiBcXnuWxuFJHe6a5Hz7qwhwe5OgaSYI0IJvkLqWX1ASG+cJOkEiA==",
+      "dev": true,
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/ansi-styles?sponsor=1"
+      }
+    },
     "node_modules/anymatch": {
       "version": "3.1.3",
       "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-3.1.3.tgz",
@@ -750,12 +721,6 @@
       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
       "integrity": "sha512-PCVAQswWemu6UdxsDFFX/+gVeYqKAod3D3UVm91jHwynguOwAvYPhx8nNlM++NqRcK6CxxpUafjmhIdKiHibqg=="
     },
-    "node_modules/asap": {
-      "version": "2.0.6",
-      "resolved": "https://registry.npmjs.org/asap/-/asap-2.0.6.tgz",
-      "integrity": "sha512-BSHWgDSAiKs50o2Re8ppvp3seVHXSRM44cdSsT9FfNEUUZLOGWVCsiWaRPWM1Znn+mqZ1OfVZ3z3DWEzSp7hRA==",
-      "dev": true
-    },
     "node_modules/assertion-error": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/assertion-error/-/assertion-error-1.1.0.tgz",
@@ -765,12 +730,6 @@
         "node": "*"
       }
     },
-    "node_modules/asynckit": {
-      "version": "0.4.0",
-      "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
-      "integrity": "sha512-Oei9OH4tRh0YqU3GxhX79dM/mwVgvbZJaSNaRk+bshkj0S5cfHcgYakreBjrHwatXKbz+IoIdYLxrKim2MjW0Q==",
-      "dev": true
-    },
     "node_modules/balanced-match": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
@@ -920,27 +879,6 @@
         "fsevents": "~2.3.2"
       }
     },
-    "node_modules/combined-stream": {
-      "version": "1.0.8",
-      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.8.tgz",
-      "integrity": "sha512-FQN4MRfuJeHf7cBbBMJFXhKSDq+2kAArBlmRBvcvFE5BB1HZKXtSFASDhdlz9zOYwxh8lDdnvmMOe/+5cdoEdg==",
-      "dev": true,
-      "dependencies": {
-        "delayed-stream": "~1.0.0"
-      },
-      "engines": {
-        "node": ">= 0.8"
-      }
-    },
-    "node_modules/component-emitter": {
-      "version": "1.3.1",
-      "resolved": "https://registry.npmjs.org/component-emitter/-/component-emitter-1.3.1.tgz",
-      "integrity": "sha512-T0+barUSQRTUQASh8bx02dl+DhF54GtIDY13Y3m9oWTklKbb3Wv974meRpeZ3lp1JpLVECWWNHC4vaG2XHXouQ==",
-      "dev": true,
-      "funding": {
-        "url": "https://github.com/sponsors/sindresorhus"
-      }
-    },
     "node_modules/concat-map": {
       "version": "0.0.1",
       "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
@@ -979,12 +917,6 @@
       "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz",
       "integrity": "sha512-QADzlaHc8icV8I7vbaJXJwod9HWYp8uCqf1xa4OfNu1T7JVxQIrUgOWtHdNDtPiywmFbiS12VjotIXLrKM3orQ=="
     },
-    "node_modules/cookiejar": {
-      "version": "2.1.4",
-      "resolved": "https://registry.npmjs.org/cookiejar/-/cookiejar-2.1.4.tgz",
-      "integrity": "sha512-LDx6oHrK+PhzLKJU9j5S7/Y3jM/mUHvD/DeI1WQmJn652iPC5Y4TBzC9l+5OMOXlyTTA+SmVUPm0HQUwpD5Jqw==",
-      "dev": true
-    },
     "node_modules/cross-spawn": {
       "version": "7.0.3",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.3.tgz",
@@ -999,15 +931,6 @@
         "node": ">= 8"
       }
     },
-    "node_modules/data-uri-to-buffer": {
-      "version": "4.0.1",
-      "resolved": "https://registry.npmjs.org/data-uri-to-buffer/-/data-uri-to-buffer-4.0.1.tgz",
-      "integrity": "sha512-0R9ikRb668HB7QDxT1vkpuUBtqc53YyAwMwGeUFKRojY/NWKvdZ+9UYtRfGmhqNbRkTSVpMbmyhXipFFv2cb/A==",
-      "dev": true,
-      "engines": {
-        "node": ">= 12"
-      }
-    },
     "node_modules/debug": {
       "version": "2.6.9",
       "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
@@ -1044,15 +967,6 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
-    "node_modules/delayed-stream": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
-      "integrity": "sha512-ZySD7Nf91aLB0RxL4KGrKHBXl7Eds1DAmEdcoVawXnLD7SDhpNgtuII2aAkg7a7QS41jxPSZ17p4VdGnMHk3MQ==",
-      "dev": true,
-      "engines": {
-        "node": ">=0.4.0"
-      }
-    },
     "node_modules/depd": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/depd/-/depd-2.0.0.tgz",
@@ -1070,16 +984,6 @@
         "npm": "1.2.8000 || >= 1.4.16"
       }
     },
-    "node_modules/dezalgo": {
-      "version": "1.0.4",
-      "resolved": "https://registry.npmjs.org/dezalgo/-/dezalgo-1.0.4.tgz",
-      "integrity": "sha512-rXSP0bf+5n0Qonsb+SVVfNfIsimO4HEtmnIpPHY8Q1UCzKlQrDMfdobr8nJOOsRgWCyMRqeSBQzmWUMq7zvVig==",
-      "dev": true,
-      "dependencies": {
-        "asap": "^2.0.0",
-        "wrappy": "1"
-      }
-    },
     "node_modules/diff-sequences": {
       "version": "29.6.3",
       "resolved": "https://registry.npmjs.org/diff-sequences/-/diff-sequences-29.6.3.tgz",
@@ -1089,17 +993,6 @@
         "node": "^14.15.0 || ^16.10.0 || >=18.0.0"
       }
     },
-    "node_modules/dotenv": {
-      "version": "16.4.5",
-      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-16.4.5.tgz",
-      "integrity": "sha512-ZmdL2rui+eB2YwhsWzjInR8LldtZHGDoQ1ugH85ppHKwpUHL7j7rN0Ti9NCnGiQbhaZ11FpR+7ao1dNsmduNUg==",
-      "engines": {
-        "node": ">=12"
-      },
-      "funding": {
-        "url": "https://dotenvx.com"
-      }
-    },
     "node_modules/ee-first": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/ee-first/-/ee-first-1.1.1.tgz",
@@ -1192,6 +1085,29 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/execa": {
+      "version": "8.0.1",
+      "resolved": "https://registry.npmjs.org/execa/-/execa-8.0.1.tgz",
+      "integrity": "sha512-VyhnebXciFV2DESc+p6B+y0LjSm0krU4OgJN44qFAhBY0TJ+1V61tYD2+wHusZ6F9n5K+vl8k0sTy7PEfV4qpg==",
+      "dev": true,
+      "dependencies": {
+        "cross-spawn": "^7.0.3",
+        "get-stream": "^8.0.1",
+        "human-signals": "^5.0.0",
+        "is-stream": "^3.0.0",
+        "merge-stream": "^2.0.0",
+        "npm-run-path": "^5.1.0",
+        "onetime": "^6.0.0",
+        "signal-exit": "^4.1.0",
+        "strip-final-newline": "^3.0.0"
+      },
+      "engines": {
+        "node": ">=16.17"
+      },
+      "funding": {
+        "url": "https://github.com/sindresorhus/execa?sponsor=1"
+      }
+    },
     "node_modules/express": {
       "version": "4.18.3",
       "resolved": "https://registry.npmjs.org/express/-/express-4.18.3.tgz",
@@ -1233,35 +1149,6 @@
         "node": ">= 0.10.0"
       }
     },
-    "node_modules/fast-safe-stringify": {
-      "version": "2.1.1",
-      "resolved": "https://registry.npmjs.org/fast-safe-stringify/-/fast-safe-stringify-2.1.1.tgz",
-      "integrity": "sha512-W+KJc2dmILlPplD/H4K9l9LcAHAfPtP6BY84uVLXQ6Evcz9Lcg33Y2z1IVblT6xdY54PXYVHEv+0Wpq8Io6zkA==",
-      "dev": true
-    },
-    "node_modules/fetch-blob": {
-      "version": "3.2.0",
-      "resolved": "https://registry.npmjs.org/fetch-blob/-/fetch-blob-3.2.0.tgz",
-      "integrity": "sha512-7yAQpD2UMJzLi1Dqv7qFYnPbaPx7ZfFK6PiIxQ4PfkGPyNyl2Ugx+a/umUonmKqjhM4DnfbMvdX6otXq83soQQ==",
-      "dev": true,
-      "funding": [
-        {
-          "type": "github",
-          "url": "https://github.com/sponsors/jimmywarting"
-        },
-        {
-          "type": "paypal",
-          "url": "https://paypal.me/jimmywarting"
-        }
-      ],
-      "dependencies": {
-        "node-domexception": "^1.0.0",
-        "web-streams-polyfill": "^3.0.3"
-      },
-      "engines": {
-        "node": "^12.20 || >= 14.13"
-      }
-    },
     "node_modules/fill-range": {
       "version": "7.0.1",
       "resolved": "https://registry.npmjs.org/fill-range/-/fill-range-7.0.1.tgz",
@@ -1291,47 +1178,6 @@
         "node": ">= 0.8"
       }
     },
-    "node_modules/form-data": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/form-data/-/form-data-4.0.0.tgz",
-      "integrity": "sha512-ETEklSGi5t0QMZuiXoA/Q6vcnxcLQP5vdugSpuAyi6SVGi2clPPp+xgEhuMaHC+zGgn31Kd235W35f7Hykkaww==",
-      "dev": true,
-      "dependencies": {
-        "asynckit": "^0.4.0",
-        "combined-stream": "^1.0.8",
-        "mime-types": "^2.1.12"
-      },
-      "engines": {
-        "node": ">= 6"
-      }
-    },
-    "node_modules/formdata-polyfill": {
-      "version": "4.0.10",
-      "resolved": "https://registry.npmjs.org/formdata-polyfill/-/formdata-polyfill-4.0.10.tgz",
-      "integrity": "sha512-buewHzMvYL29jdeQTVILecSaZKnt/RJWjoZCF5OW60Z67/GmSLBkOFM7qh1PI3zFNtJbaZL5eQu1vLfazOwj4g==",
-      "dev": true,
-      "dependencies": {
-        "fetch-blob": "^3.1.2"
-      },
-      "engines": {
-        "node": ">=12.20.0"
-      }
-    },
-    "node_modules/formidable": {
-      "version": "2.1.2",
-      "resolved": "https://registry.npmjs.org/formidable/-/formidable-2.1.2.tgz",
-      "integrity": "sha512-CM3GuJ57US06mlpQ47YcunuUZ9jpm8Vx+P2CGt2j7HpgkKZO/DJYQ0Bobim8G6PFQmK5lOqOOdUXboU+h73A4g==",
-      "dev": true,
-      "dependencies": {
-        "dezalgo": "^1.0.4",
-        "hexoid": "^1.0.0",
-        "once": "^1.4.0",
-        "qs": "^6.11.0"
-      },
-      "funding": {
-        "url": "https://ko-fi.com/tunnckoCore/commissions"
-      }
-    },
     "node_modules/forwarded": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/forwarded/-/forwarded-0.2.0.tgz",
@@ -1397,6 +1243,18 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/get-stream": {
+      "version": "8.0.1",
+      "resolved": "https://registry.npmjs.org/get-stream/-/get-stream-8.0.1.tgz",
+      "integrity": "sha512-VaUJspBffn/LMCJVoMvSAdmscJyS1auj5Zulnn5UoYcY531UWmdwhRWkcGKnGU93m5HSXP9LP2usOryrBtQowA==",
+      "dev": true,
+      "engines": {
+        "node": ">=16"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/glob-parent": {
       "version": "5.1.2",
       "resolved": "https://registry.npmjs.org/glob-parent/-/glob-parent-5.1.2.tgz",
@@ -1473,15 +1331,6 @@
         "node": ">= 0.4"
       }
     },
-    "node_modules/hexoid": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/hexoid/-/hexoid-1.0.0.tgz",
-      "integrity": "sha512-QFLV0taWQOZtvIRIAdBChesmogZrtuXvVWsFHZTk2SU+anspqZ2vMnoLg7IE1+Uk16N19APic1BuF8bC8c2m5g==",
-      "dev": true,
-      "engines": {
-        "node": ">=8"
-      }
-    },
     "node_modules/http-errors": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/http-errors/-/http-errors-2.0.0.tgz",
@@ -1497,6 +1346,15 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/human-signals": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/human-signals/-/human-signals-5.0.0.tgz",
+      "integrity": "sha512-AXcZb6vzzrFAUE61HnN4mpLqd/cSIwNQjtNWR0euPm6y0iqx3G4gOXaIDdtdDwZmhwe82LA6+zinmW4UBWVePQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=16.17.0"
+      }
+    },
     "node_modules/iconv-lite": {
       "version": "0.4.24",
       "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.24.tgz",
@@ -1569,12 +1427,30 @@
         "node": ">=0.12.0"
       }
     },
+    "node_modules/is-stream": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/is-stream/-/is-stream-3.0.0.tgz",
+      "integrity": "sha512-LnQR4bZ9IADDRSkvpqMGvt/tEJWclzklNgSw48V5EAaAeDd6qGvN8ei6k5p0tvxSR171VmGyHuTiAOfxAbr8kA==",
+      "dev": true,
+      "engines": {
+        "node": "^12.20.0 || ^14.13.1 || >=16.0.0"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/isexe": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/isexe/-/isexe-2.0.0.tgz",
       "integrity": "sha512-RHxMLp9lnKHGHRng9QFhRCMbYAcVpn69smSGcq3f36xjgVVWThj4qqLbTLlq7Ssj8B+fIQ1EuCEGI2lKsyQeIw==",
       "dev": true
     },
+    "node_modules/js-tokens": {
+      "version": "8.0.3",
+      "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-8.0.3.tgz",
+      "integrity": "sha512-UfJMcSJc+SEXEl9lH/VLHSZbThQyLpw1vLO1Lb+j4RWDvG3N2f7yj3PVQA3cmkTBNldJ9eFnM+xEXxHIXrYiJw==",
+      "dev": true
+    },
     "node_modules/jsonc-parser": {
       "version": "3.2.1",
       "resolved": "https://registry.npmjs.org/jsonc-parser/-/jsonc-parser-3.2.1.tgz",
@@ -1687,6 +1563,18 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/mimic-fn": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/mimic-fn/-/mimic-fn-4.0.0.tgz",
+      "integrity": "sha512-vqiC06CuhBTUdZH+RYl8sFrL096vA45Ok5ISO6sE/Mr1jRbGH4Csnhi8f3wKVl7x8mO4Au7Ir9D3Oyv1VYMFJw==",
+      "dev": true,
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
     "node_modules/minimatch": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.1.2.tgz",
@@ -1742,43 +1630,6 @@
         "node": ">= 0.6"
       }
     },
-    "node_modules/node-domexception": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/node-domexception/-/node-domexception-1.0.0.tgz",
-      "integrity": "sha512-/jKZoMpw0F8GRwl4/eLROPA3cfcXtLApP0QzLmUT/HuPCZWyB7IY9ZrMeKw2O/nFIqPQB3PVM9aYm0F312AXDQ==",
-      "dev": true,
-      "funding": [
-        {
-          "type": "github",
-          "url": "https://github.com/sponsors/jimmywarting"
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 }
diff --git a/package.json b/package.json
index 95ad1b5..02cb641 100644
--- a/package.json
+++ b/package.json
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diff --git a/tests/proposals.test.js b/tests/proposals.test.js
index 01e7d38..0630cb3 100644
--- a/tests/proposals.test.js
+++ b/tests/proposals.test.js
@@ -1,6 +1,3 @@
-import { test, expect, beforeAll, afterAll, describe } from "vitest";
-import fetch from "node-fetch";
-
 describe("Proposals API", () => {
   test("should return all proposals", async () => {
     const res = await fetch("http://localhost:3000/proposals");
diff --git a/tests/topics.test.js b/tests/topics.test.js
index 275f36e..7aef0bd 100644
--- a/tests/topics.test.js
+++ b/tests/topics.test.js
@@ -1,12 +1,5 @@
-import { test, expect, beforeAll, afterAll, describe } from "vitest";
-import fetch from "node-fetch";
-import { createServer } from "http";
-import app from "../app";
-
-let server;
-
 describe("Topics API", () => {
-  test("GET /topics", async ({ expect }) => {
+  test("GET /topics", async () => {
     const response = await fetch("http://localhost:3000/topics");
     const data = await response.json();