feat: Implement a new Dockerized PostgreSQL data synchronization service with cron scheduling.

sync/Dockerfile

@@ -0,0 +1,12 @@
+FROM node:20-alpine
+
+WORKDIR /app
+
+COPY package.json ./
+RUN npm install --omit=dev
+
+COPY . .
+
+EXPOSE 3002
+
+CMD ["node", "index.js"]