add workflow to build codespace container

Author: dan-mm

.github/workflows/build-codespace-container.yml

@@ -0,0 +1,31 @@
+name: Build Codespace Container
+on:
+  workflow_dispatch:
+
+jobs:
+  build-and-push-containers:
+    runs-on: ubuntu-latest
+    permissions:
+      packages: write
+      contents: read
+    steps:
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Docker Registry
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ inputs.github-token }}
+
+      - name: Build and push Docker container
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          file: /.devcontainer/containerized/Dockerfile  # Path to the Dockerfile
+          push: true
+          tags: ghcr.io/green-coding-berlin/codespace-container:latest