Added healthchecks and ability to monitor container health from outside

Dockerfile

@@ -1,11 +1,17 @@
 FROM node:22-alpine
 
+ENV NODE_ENV=production
+
 WORKDIR /app
 
 COPY package*.json ./
 
-RUN npm install
+RUN npm install && npm cache clean --force
 
 COPY . .
 
+RUN chown -R node:node /app
+
+USER node
+
 CMD ["sh", "-c", "node index.mjs ${DEVICE:-/dev/ttyACM0}"]

docker-compose.yml

@@ -1,6 +1,9 @@
 services:
   map-uploader:
     build: .
+    # Optionally expose the port if you want to monitor the container's health externally
+    # ports:
+    #   - "8080:8080"
     environment:
       # Set to the appropriate device for your setup, either /dev/ttyACM0 if connected by USB to a USB companion or IP:port if connected over network to a wifi companion
       - DEVICE=/dev/ttyACM0
@@ -9,4 +12,10 @@ services:
     privileged: true
     # Adjust according to your setup, but this is the default
     devices:
-      - /dev/ttyACM0:/dev/ttyACM0
+      - /dev/ttyACM0:/dev/ttyACM0
+    healthcheck:
+      test: ["CMD", "wget", "--spider", "-q", "http://localhost:8080/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 1
+      start_period: 5s

index.mjs

@@ -6,11 +6,24 @@ import {
 
 import { KeyPair } from './supercop/index.mjs';
 import crypto from 'crypto';
+import http from 'http';
 
 const device = process.argv[2] ?? '/dev/ttyACM0';
 const apiURL = 'https://map.meshcore.dev/api/v1/uploader/node';
 const seenAdverts = {};
 let clientInfo = {};
+let isHealthy = false;
+
+// Health check server
+http.createServer((req, res) => {
+  if (req.url === '/health') {
+    res.writeHead(isHealthy ? 200 : 503);
+    res.end(isHealthy ? 'OK' : 'Not Ready');
+  } else {
+    res.writeHead(404);
+    res.end();
+  }
+}).listen(8080);
 
 const signData = async (kp, data) => {
   const json = JSON.stringify(data);
@@ -88,6 +101,7 @@ if(device.startsWith('/') || device.startsWith('COM')){
 
 connection.on('connected', async () => {
   console.log(`Connected.`);
+  isHealthy = true;
 
   connection.setManualAddContacts();
 
@@ -97,6 +111,21 @@ connection.on('connected', async () => {
   console.log('Map uploader waiting for adverts...');
 });
 
+connection.on('disconnected', () => {
+  console.log('Disconnected. Exiting...');
+  process.exit(1);
+});
+
+connection.on('close', () => {
+  console.log('Connection closed. Exiting...');
+  process.exit(1);
+});
+
+connection.on('error', (err) => {
+  console.error('Connection error:', err);
+  process.exit(1);
+});
+
 connection.on(Constants.PushCodes.LogRxData, async (event) => {
   try {
     await processPacket(connection, event.raw);