Create docker-build.yml

Author: monaka

.github/workflows/docker-build.yml

@@ -0,0 +1,27 @@
+name: Publish Docker image
+on:
+  release:
+    types: [published]
+jobs:
+  push_to_registry:
+    name: Push Docker image to GitHub Packages
+    runs-on: ubuntu-latest
+    permissions:
+      packages: write
+      contents: read
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@v2
+      - name: Log in to GitHub Docker Registry
+        uses: docker/login-action@v1
+        with:
+          registry: docker.pkg.github.com
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Build container image
+        uses: docker/build-push-action@v2
+        with:
+          push: true
+          tags: |
+            docker.pkg.github.com/${{ github.repository }}/slapd-simple:${{ github.sha }}
+            docker.pkg.github.com/${{ github.repository }}/slapd-simple:${{ github.ref }}