Final integrated deployment: UI served on /frontend path, Unified Docker container

Dockerfile

@@ -1,4 +1,12 @@
-# Step 1: Build Backend | مرحلة بناء الخلفية
+# Step 1: Build Frontend | مرحلة بناء الواجهة
+FROM node:20-alpine AS frontend-builder
+WORKDIR /usr/src/app/frontend
+COPY frontend/package*.json ./
+RUN npm install
+COPY frontend/ ./
+RUN npm run build
+
+# Step 2: Build Backend | مرحلة بناء الخلفية
 FROM node:20-alpine AS builder
 WORKDIR /usr/src/app
 COPY package*.json ./
@@ -6,12 +14,14 @@ RUN npm install
 COPY . .
 RUN npm run build
 
-# Step 2: Production Phase | مرحلة الإنتاج
+# Step 3: Production Phase | مرحلة الإنتاج
 FROM node:20-alpine
 WORKDIR /usr/src/app
 COPY package*.json ./
 RUN npm install --only=production
 COPY --from=builder /usr/src/app/dist ./dist
+# Copy frontend build to backend public folder | نسخ واجهة المستخدم إلى الملفات العامة
+COPY --from=frontend-builder /usr/src/app/frontend/dist ./public
 
 # Expose port | فتح المنفذ
 EXPOSE 3660