add docker file and start command

Dockerfile

@@ -0,0 +1,17 @@
+FROM node:20
+LABEL authors="vovastelmashchuk"
+
+WORKDIR /app
+
+COPY package*.json ./
+
+RUN npm install
+
+COPY . .
+
+EXPOSE 3000
+
+ENV NODE_ENV=production
+
+CMD [ "npm", "start" ]
+

package.json

@@ -5,6 +5,7 @@
   "type": "module",
   "scripts": {
     "dev": "nodemon src/app.js",
+    "start": "node src/app.js",
     "build:css": "tailwindcss -i ./src/styles.css -o ./src/public/styles.css --watch"
   },
   "keywords": [],