fix: revert gatus config

kubernetes/main/apps/observability/gatus/app/config/config.yaml

@@ -1,10 +1,9 @@
 ---
-# Note: Gatus vars should be escaped with $${VAR_NAME} to avoid interpolation by Flux
 web:
-  port: $${WEB_PORT}
+  port: ${WEB_PORT}
 storage:
   type: postgres
-  path: $${POSTGRES_URI}?sslmode=require
+  path: ${POSTGRES_URI}?sslmode=require
   caching: true
 metrics: true
 debug: false
@@ -14,7 +13,7 @@ ui:
   logo: https://raw.githubusercontent.com/joryirving/home-ops/main/docs/src/assets/icons/lds-transparent.png
 alerting:
   discord:
-    webhook-url: $${DISCORD_WEBHOOK_URL}
+    webhook-url: ${DISCORD_WEBHOOK_URL}
     default-alert:
       description: health-check failed
       send-on-resolved: true
@@ -27,21 +26,21 @@ connectivity:
 endpoints:
   - name: status
     group: external
-    url: https://status.$${SECRET_DOMAIN}
+    url: https://status.${SECRET_DOMAIN}
     interval: 1m
     client:
       dns-resolver: tcp://1.1.1.1:53
     conditions: ["[STATUS] == 200"]
-    alerts: { type: discord }
+    alerts: [{ type: discord }]
   - name: flux-webhook
     group: external
-    url: https://flux-webhook.$${SECRET_DOMAIN}
+    url: https://flux-webhook.${SECRET_DOMAIN}
     interval: 1m
     client:
       dns-resolver: tcp://1.1.1.1:53
     conditions: ["[STATUS] == 404"]
-    alerts: { type: discord }
+    alerts: [{ type: discord }]
 remote:
   instances:
     - endpoint-prefix: ""
-      url: "https://status-utility.$${SECRET_DOMAIN}/api/v1/endpoints/statuses"
+      url: "https://status-utility.${SECRET_DOMAIN}/api/v1/endpoints/statuses"