Merge pull request #1 from austinlparker/addGitHubAction

add build action

.github/workflows/docker-publish.yml

@@ -0,0 +1,29 @@
+name: Build and Publish Docker Image
+
+on:
+  release:
+    types: [ published ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v2
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v1
+
+    - name: Login to DockerHub
+      uses: docker/login-action@v1 
+      with:
+        username: ${{ secrets.DOCKERHUB_USERNAME }}
+        password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+    - name: Build and push
+      uses: docker/build-push-action@v2
+      with:
+        context: .
+        push: true
+        tags: puckpuck/seashell:${{ github.event.release.tag_name }}
+        platforms: linux/amd64,linux/arm64