Automatically publish docker image

.github/workflows/docker-publish.yml

@@ -0,0 +1,73 @@
+---
+name: Docker
+
+on:
+  push:
+    # Publish `master` as Docker `latest` image.
+    branches:
+      - master
+
+    # Publish `v1.2.3` tags as releases.
+    tags:
+      - v*
+
+  # Run tests for any PRs.
+  pull_request:
+
+env:
+  IMAGE_NAME: api
+
+jobs:
+  # Run tests.
+  # See also https://docs.docker.com/docker-hub/builds/automated-testing/
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Run tests
+        run: |
+          if [ -f docker-compose.test.yml ]; then
+            docker-compose --file docker-compose.test.yml build
+            docker-compose --file docker-compose.test.yml run sut
+          else
+            docker build . --file Dockerfile
+          fi
+
+  push:
+    needs: test
+
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push'
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Build image
+        run: docker build . --file Dockerfile --tag $IMAGE_NAME
+
+      - name: Log into GitHub Container Registry
+        run: echo "${{ secrets.CR_PAT }}" | docker login https://ghcr.io -u ${{ github.actor }} --password-stdin
+
+      - name: Push image to GitHub Container Registry
+        run: |
+          IMAGE_ID=ghcr.io/${{ github.repository_owner }}/$IMAGE_NAME
+
+          # Change all uppercase to lowercase
+          IMAGE_ID=$(echo $IMAGE_ID | tr '[A-Z]' '[a-z]')
+
+          # Strip git ref prefix from version
+          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
+
+          # Strip "v" prefix from tag name
+          [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
+
+          # Use Docker `latest` tag convention
+          [ "$VERSION" == "master" ] && VERSION=latest
+
+          echo IMAGE_ID=$IMAGE_ID
+          echo VERSION=$VERSION
+
+          docker tag $IMAGE_NAME $IMAGE_ID:$VERSION
+          docker push $IMAGE_ID:$VERSION

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+- Dev: Automatically publish docker image to the GitHub Container Registry. (#279)
+
 ## 1.2.2
 
 - YouTube: Added comment count to rich video tooltips. (#252)

Dockerfile

@@ -1,6 +1,6 @@
 FROM golang:1.16 AS build
 ADD . /src
-RUN cd /src/cmd/api && GOOS=linux GOARCH=amd64 go build -ldflags '-extldflags "-static"'
+RUN cd /src/cmd/api && GOOS=linux GOARCH=amd64 go build -tags netgo -ldflags '-extldflags "-static"'
 
 FROM alpine:latest
 WORKDIR /app