feat: refactor Dockerfile for multi-stage build and remove obsolete Dockerfile.koyeb

Author: whiteSHADOW1234

Dockerfile

@@ -1,22 +1,27 @@
-FROM node:16-alpine
+# Stage 1: Build the React application and backend
+FROM node:16-alpine AS build-stage
 
 WORKDIR /app
-
+RUN npm install -g @babel/plugin-proposal-private-property-in-object
+# Install Node dependencies for backend
 COPY backend/package*.json ./backend/
 RUN npm ci --only=production --prefix backend
 
-COPY backend/ ./backend
+# Copy backend code
+COPY backend ./backend
 
+# Install Node dependencies for frontend
 COPY frontend/package*.json ./frontend/
 RUN npm ci --only=production --prefix frontend
 
-COPY frontend/ ./frontend
+# Copy frontend code
+COPY frontend ./frontend
+
+# Build the React app using react-scripts
+RUN cd frontend && npm run build && cd ..
+RUN rm -rf ./frontend/node_modules
 
 ARG API_BASE_URL
 ENV API_BASE_URL=${API_BASE_URL}
 
-RUN npm run build --prefix frontend
-
-RUN rm -rf ./frontend/node_modules
-
 CMD ["npm", "start", "--prefix", "backend"]