Implement persistent backend with Docker storage, photo uploads, and real-time SSE sync

Dockerfile

@@ -10,14 +10,30 @@ COPY . ./
 RUN npm run build
 
 # Production stage
-FROM nginx:alpine
+FROM node:22-alpine
 
-COPY --from=builder /app/dist /usr/share/nginx/html
-COPY nginx.conf /etc/nginx/conf.d/default.conf
+WORKDIR /app
+
+ENV NODE_ENV=production
+ENV PORT=80
+ENV DATA_DIR=/app/data
+
+# Install production dependencies
+COPY package*.json ./
+RUN npm install --omit=dev
+
+# Copy backend server code
+COPY server/ ./server/
+
+# Copy built frontend assets
+COPY --from=builder /app/dist ./dist
+
+# Create persistent storage directories
+RUN mkdir -p /app/data/uploads
 
 EXPOSE 80
 
 HEALTHCHECK --interval=15s --timeout=5s --start-period=5s --retries=3 \
-  CMD wget --quiet --tries=1 --spider http://127.0.0.1:80/ || exit 1
+  CMD wget --quiet --tries=1 --spider http://127.0.0.1:80/api/health || exit 1
 
-CMD ["nginx", "-g", "daemon off;"]
+CMD ["node", "server/index.js"]