Fix workflow: change branch from main to master

.github/workflows/docker-build.yml

@@ -2,15 +2,52 @@ name: Build and Push Docker Image
 
 on:
   push:
-    branches: [ master,main ]
+    branches: [ master, main ]
+  workflow_dispatch:
 
 jobs:
-  build:
+  build-backend:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
-      - name: Build and push
+      - name: Checkout code
+        uses: actions/checkout@v3
+      
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      
+      - name: Build and push backend
         uses: docker/build-push-action@v4
         with:
+          context: ./backend
+          file: ./backend/Dockerfile
           push: true
-          tags: 537yaha/ai-cs:latest
+          tags: 537yaha/ai-cs-backend:latest
+
+  build-frontend:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+      
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      
+      - name: Build and push frontend
+        uses: docker/build-push-action@v4
+        with:
+          context: ./frontend
+          file: ./frontend/Dockerfile
+          push: true
+          tags: 537yaha/ai-cs-frontend:latest