Initial implementation

Dockerfile

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+FROM node:24-alpine AS dependencies
+
+WORKDIR /app
+COPY package.json package-lock.json ./
+RUN npm ci --omit=dev
+
+FROM node:24-alpine
+
+ENV NODE_ENV=production
+WORKDIR /app
+
+COPY --from=dependencies /app/node_modules ./node_modules
+COPY package.json ./
+COPY src ./src
+
+USER node
+EXPOSE 3000
+
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+  CMD node -e "fetch('http://127.0.0.1:'+(process.env.PORT||3000)+'/healthz').then(r=>{if(!r.ok)process.exit(1)}).catch(()=>process.exit(1))"
+
+CMD ["node", "src/index.js"]