Merge pull request #37 from yanokwa/update-docker

Build image on every push, hide secrets

.github/workflows/ghcr.yml

@@ -0,0 +1,47 @@
+name: GHCR
+
+on: push
+
+env:
+    # Use docker.io for Docker Hub if empty
+    REGISTRY: ghcr.io
+    # github.repository as <account>/<repo>
+    IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+    build:
+        runs-on: ubuntu-latest
+        permissions:
+            contents: read
+            packages: write
+
+        steps:
+            - name: Checkout repository
+              uses: actions/checkout@v2
+
+            # Login against a Docker registry
+            # https://github.com/docker/login-action
+            - name: Log into registry ${{ env.REGISTRY }}
+              uses: docker/login-action@28218f9b04b4f3f62068d7b6ce6ca5b26e35336c
+              with:
+                  registry: ${{ env.REGISTRY }}
+                  username: ${{ github.actor }}
+                  password: ${{ secrets.GITHUB_TOKEN }}
+
+            # Extract metadata (tags, labels) for Docker
+            # https://github.com/docker/metadata-action
+            - name: Extract Docker metadata
+              id: meta
+              uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
+              with:
+                  images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+            # Build and push Docker image with Buildx
+            # https://github.com/docker/build-push-action
+            - name: Build and push Docker image
+              uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
+              with:
+                  context: .
+                  push: true
+                  tags: ${{ steps.meta.outputs.tags }}
+                  labels: ${{ steps.meta.outputs.labels }}