Add Docker configuration for PostgreSQL, backend, and frontend services

backend/Dockerfile

@@ -0,0 +1,26 @@
+FROM node:lts-alpine
+
+WORKDIR /app
+
+COPY package*.json ./
+
+RUN npm install --only=production
+RUN npm install -g prisma
+
+COPY . .
+
+RUN npx prisma generate
+
+RUN mkdir -p logs
+
+EXPOSE 3001
+
+RUN echo '#!/bin/sh\n\
+echo "Waiting for database..."\n\
+sleep 10\n\
+echo "Running database migrations..."\n\
+npx prisma migrate deploy\n\
+echo "Starting server..."\n\
+npm start' > /app/start.sh && chmod +x /app/start.sh
+
+CMD ["/app/start.sh"]