Docker Compose configuration

.dockerignore

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+compose.yml
+README.md
+database

.env.sample

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-DB_HOST="172.0.0.1"
+DB_HOST="db"
+DB_ROOT_PASSWORD="root_password"
 DB_USER="openunitstate"
 DB_PASSWORD=""
 DB_NAME="openunitstate"
+MQTT_URL="mqtt://broker.example.com:1883"
 MQTT_CLIENT_ID="njs_1"
 MQTT_USERNAME="ousbackendmaster"
 MQTT_PASSWORD=""
-MQTT_PUB_CLIENT_ID="njs_publisher"
+MQTT_PUB_CLIENT_ID="njs_publisher"
+ROOT_TOPIC="openunitstate"

Dockerfile

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+FROM node:25
+WORKDIR /app
+COPY package*.json ./
+RUN npm install
+COPY . .
+CMD ["npm", "start"]

compose.yml

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+name: openunitstate-backend
+services:
+  db:
+    image: mariadb:latest
+    environment:
+      MYSQL_ROOT_PASSWORD: ${DB_ROOT_PASSWORD}
+      MYSQL_DATABASE: ${DB_NAME}
+      MYSQL_USER: ${DB_USER}
+      MYSQL_PASSWORD: ${DB_PASSWORD}
+    volumes:
+      - ./database:/var/lib/mysql
+      - ./sql_structure_openunitstate.sql:/docker-entrypoint-initdb.d/init.sql
+    healthcheck:
+      test: ["CMD", "healthcheck.sh", "--connect", "--innodb_initialized"]
+      timeout: 20s
+      retries: 10
+    restart: unless-stopped
+
+  app:
+    build: .
+    depends_on:
+      db:
+        condition: service_healthy
+    environment:
+      DB_HOST: db
+      DB_USER: ${DB_USER}
+      DB_PASSWORD: ${DB_PASSWORD}
+      DB_NAME: ${DB_NAME}
+      MQTT_URL: ${MQTT_URL}
+      MQTT_CLIENT_ID: ${MQTT_CLIENT_ID}
+      MQTT_USERNAME: ${MQTT_USERNAME}
+      MQTT_PASSWORD: ${MQTT_PASSWORD}
+      ROOT_TOPIC: ${ROOT_TOPIC}
+    restart: unless-stopped
+
+networks:
+  default:
+    driver: bridge 
+    name: openunitstate

package.json

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+{
+  "name": "openunitstate-backend",
+  "version": "1.0.0",
+  "description": "Backend service for OpenUnitState",
+  "main": "app.js",
+  "scripts": {
+    "start": "node app.js",
+    "dev": "node app.js"
+  },
+  "dependencies": {
+    "mqtt": "^4.3.7",
+    "mysql": "^2.18.1"
+  },
+  "engines": {
+    "node": ">=12.0.0"
+  },
+  "keywords": [
+    "mqtt",
+    "mysql",
+    "iot",
+    "unit-state"
+  ],
+  "author": "",
+  "license": "GPL-3.0-only"
+}