initial image build and publish workflow

.github/workflows/build.yml

@@ -0,0 +1,41 @@
+name: Build Images
+
+on:
+  pull_request:
+  workflow_run:
+    workflows: ["Coverage"]
+    types:
+      - completed
+  push:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    if: ${{ github.event.workflow_run.conclusion == 'success' }}
+    steps:
+      - name: 'Checkout GitHub Action'
+        id: checkout
+        uses: actions/checkout@v4
+
+      - name: 'Build Image'
+        id: build
+        run: |
+          docker build -t ghcr.io/cfpb/regtech/sbl/regtech-mail-api:latest -f Dockerfile .
+
+      - name: 'Login to GitHub Container Registry'
+        id: login
+        uses: docker/login-action@v3
+        if: steps.build.conclusion == 'success'
+        with:
+          registry: ghcr.io
+          username: ${{github.actor}}
+          password: ${{secrets.GITHUB_TOKEN}}
+
+      - name: 'Publish Image'
+        id: publish
+        if: github.ref == 'refs/heads/main' && steps.login.conclusion == 'success'
+        run: |
+          docker push ghcr.io/cfpb/regtech/sbl/regtech-mail-api --all-tags
+