feat: add frontend service + dockerfile + env example

config/frontend.env.example

@@ -0,0 +1,5 @@
+NODE_ENV=production
+HOST=0.0.0.0
+PORT=3000
+LIBRARY_ROOT=/library
+DATA_ROOT=/now-playing

docker-compose.yml

@@ -45,3 +45,26 @@ services:
       timeout: 5s
       retries: 3
       start_period: 30s
+
+  frontend:
+    build: ./frontend
+    image: denpa-radio-frontend:latest
+    restart: always
+    env_file: config/frontend.env
+    ports:
+      - '172.17.0.1:12001:3000'
+    volumes:
+      - type: bind
+        source: /mnt/trashbox/denpa-radio/library
+        target: /library
+        read_only: true
+      - type: bind
+        source: ./data/now-playing
+        target: /now-playing
+        read_only: true
+    healthcheck:
+      test: ['CMD', 'wget', '-q', '-O', '-', 'http://localhost:3000/api/stations.json']
+      interval: 30s
+      timeout: 5s
+      retries: 3
+      start_period: 15s

frontend/Dockerfile

@@ -0,0 +1,20 @@
+FROM node:22-alpine AS deps
+WORKDIR /app
+COPY package.json package-lock.json ./
+RUN npm ci
+
+FROM node:22-alpine AS build
+WORKDIR /app
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+RUN npm run build
+
+FROM node:22-alpine AS runtime
+WORKDIR /app
+ENV NODE_ENV=production HOST=0.0.0.0 PORT=3000
+COPY --from=build /app/dist ./dist
+COPY --from=build /app/node_modules ./node_modules
+COPY --from=build /app/package.json ./
+USER node
+EXPOSE 3000
+CMD ["node", "./dist/server/entry.mjs"]