Add healthcheck

Dockerfile

@@ -1,5 +1,5 @@
-# Use Alpine Linux as base image
-FROM node:slim
+# Use Debian as build OS (https://github.com/nodejs/docker-node/issues/1973)
+FROM node:slim AS BUILD
 
 # Set default env variable values
 ENV PORT=3000
@@ -21,11 +21,22 @@ COPY package*.json ./
 # Install dependencies
 RUN npm i --verbose
 
+# Use Alpine Linux as base image
+FROM node:alpine
+
+WORKDIR /app
+
+# Copy from the build stage
+COPY --from=0 . .
+
 # Copy the rest of the application code
 COPY . .
 
 # Expose the port on which the Node.js application will run
 EXPOSE 3000
 
+# Configure healthcheck
+HEALTHCHECK --interval=1m --timeout=5s CMD node healtcheck.js || exit 1
+
 # Command to run the Node.js application
 CMD ["node", "server.js"]

healthcheck.js

@@ -0,0 +1,7 @@
+require('dotenv').config();
+
+fetch(`http://localhost:${process.env.PORT}/healthcheck`).then(res => {
+  return process.exit(res.status === 204 ? 0:1);
+}).catch(() => {
+  process.exit(1);
+});

package.json

@@ -6,7 +6,8 @@
   "main": "server.js",
   "private": true,
   "scripts": {
-    "start": "node server.js"
+    "start": "node server.js",
+    "health": "node healthcheck.js"
   },
   "keywords": [
     "unifi",

server.js

@@ -115,6 +115,10 @@ app.get('/img/bg.jpg', async (req, res) => {
   });
 });
 
+app.get('/healthcheck', (req,res)=> {
+  res.sendStatus(204)
+})
+
 // Serve static files
 app.use(express.static('./node_modules/bootstrap-icons/font/'));
 app.use(express.static('./node_modules/@fontsource/'));