add workflow file

Author: SimonR99

.github/workflows/build_container.yml

@@ -0,0 +1,30 @@
+name: Build and Release Docker Image
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  build_and_push:
+    runs-on: ubuntu-latest
+    permissions:
+      packages: write
+      contents: read
+
+    steps:
+    - name: Check out the repository
+      uses: actions/checkout@v2
+
+    - name: Log in to GitHub Container Registry
+      uses: docker/login-action@v1
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Build and push Docker image
+      run: |
+        IMAGE_NAME=ghcr.io/${{ github.repository_owner }}/your-image-name:latest
+        docker build -t $IMAGE_NAME .
+        docker push $IMAGE_NAME