Configure prototype image builds

.github/workflows/build_prototype.yml

@@ -0,0 +1,32 @@
+name: Build Docker Image
+
+on:
+  push:
+    branches:
+      - feature/osc-prototype
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          push: ${{ github.event_name == 'push' }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          tags: |
+            ghcr.io/${{ github.repository }}:prototype
+            ghcr.io/${{ github.repository }}:${{ github.sha }}

Dockerfile

@@ -24,7 +24,7 @@ RUN apt-get install -y gh
 
 # Install CumulusCI
 RUN pip install --no-cache-dir --upgrade pip pip-tools \
-  pip --no-cache-dir install cumulusci cookiecutter
+  pip --no-cache-dir install git+https://github.com/SFDO-Community-Sprints/CumulusCI@feature/github-environments cookiecutter
 
 # Copy devhub auth script and make it executable
 COPY devhub.sh /usr/local/bin/devhub.sh