Add Workflow to Build, Test, and Publish Image (panamax-rs#66)

* Add workflow to build and test container

This is so we can get immediat feedback when the container is broken

* don't try to push the container

* Add a simpler job to build and test the image

We don't need the full docker build push action just to test the image.
If the build and test succeeds then we can use the full action.

* Don't set up qemu in test stage

Also set the tag to the project's name

* Only run actions on pushes to master and PRs

We don't need the container created on all pushes for every feature
branch.

Co-authored-by: James Conroy <[email protected]>

Author: JamesMConroy

.github/workflows/container-test.yml

@@ -0,0 +1,58 @@
+---
+name: ci
+
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+
+env:
+  CONTAINER_NAME: panamax-rs/panamax
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Test building image
+        run: docker build -t ${{ env.CONTAINER_NAME }}:test .
+
+      - name: Run the built image
+        run: docker run --rm ${{ env.CONTAINER_NAME }}:test
+
+  release:
+    name: Release
+    runs-on: ubuntu-latest
+    needs: test
+    if: github.ref == 'refs/heads/master'
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: docker/setup-qemu-action@v1
+      - uses: docker/setup-buildx-action@v1
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and export to Docker
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          load: true
+          tags: ${{ env.TEST_TAG }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64
+          push: false
+          tags: ${{ env.CONTAINER_NAME }}:latest
+...