add gh action

Author: robherley

.github/workflows/ci.yaml

@@ -0,0 +1,51 @@
+name: CI
+
+on: [push]
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    if: github.ref_type == 'tag'
+    outputs:
+      release_id: ${{ steps.release.outputs.release_id }}
+    steps:
+      - name: Make release
+        id: release
+        uses: actions/github-script@v5
+        with:
+          script: |
+            const tag_name = context.ref.replace("refs/tags/", "")
+            const release = await github.rest.repos.createRelease({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              tag_name
+            })
+
+            core.setOutput('release_id', release.data.id);
+  docker-image:
+    runs-on: ubuntu-latest
+    needs: release
+    env:
+      REGISTRY: ghcr.io
+      IMAGE_NAME: ${{ github.repository }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Login to cr
+        uses: docker/login-action@v1
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Extract metadata for Docker
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}