Publish container on new release

.github/workflows/build.yml

@@ -1,4 +1,4 @@
-name: test kcov action
+name: test build container
 on: [push]
 
 jobs:

.github/workflows/publish.yml

@@ -0,0 +1,19 @@
+name: Publish Docker image
+on:
+  release:
+    types: [published]
+jobs:
+  push_to_registry:
+    name: Push Docker image to GitHub Packages
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@v2
+      - name: Push to GitHub Packages
+        uses: docker/build-push-action@v1
+        with:
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+          registry: docker.pkg.github.com
+          repository: sudo-bot/gh-deployer-container/phpmyadmin
+          tag_with_ref: true