build: create build-backend-image.yml

.github/workflows/build-backend-image.yml

@@ -0,0 +1,40 @@
+name: Build Backend Docker Image
+
+on:
+  push:
+    branches: 
+      - master
+      - "backend/"
+      - "backend/scopeBackend"
+  pull_request:
+    branches:
+      - master
+      - "backend/"
+      - "backend/scopeBackend"
+  # these path settings ensure this workflow only executes on a push
+  # to this YML itself, or any file in the backend or scopeBackend folders
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+    - name: Check out the repository
+      uses: actions/checkout@v4
+
+    - name: Log in to GitHub Container Registry
+      uses: docker/login-action@v2
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+        # note: GH sets up this token for you
+
+    - name: Build and push the Docker image
+      run: docker build -t ghcr.io/${{ github.repository_owner }}/backend:latest ./backend
+
+    - name: Push the Docker image
+      run: docker push ghcr.io/${{ github.repository_owner }}/backend:latest