feat: publish api-server to ghcr.io (traefik-workshops#37)

* feat: publish api-server to ghcr.io

* fix

.github/workflows/api-server.yaml

@@ -0,0 +1,56 @@
+name: 🚀 Build/Release docker api-server
+on:
+  workflow_dispatch:
+  pull_request:
+    branches:
+      - master
+    paths:
+      - '.github/workflow/api-server.yaml'
+      - 'api-server/**'
+  push:
+    branches:
+      - master
+    paths:
+      - '.github/workflow/api-server.yaml'
+      - 'api-server/**'
+    tags:
+      - 'api-server_v[0-9]+.[0-9]+.[0-9]+'
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+env:
+  REGISTRY: ghcr.io
+jobs:
+  docker-build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v4
+      - name: docker login
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: set up buildx
+        uses: docker/setup-buildx-action@v3
+      - name: docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: |
+            ${{ env.REGISTRY }}/${{ github.repository_owner }}/${{ github.repository }}
+          tags: |
+            type=raw,value=latest,enable={{is_default_branch}}
+            type=match,pattern=api-server_v\d+.\d+.\d+
+            type=raw,value={{branch}}-{{sha}}-{{date 'X'}},enable={{is_default_branch}}
+            type=ref,event=pr
+      - name: build docker images
+        uses: docker/build-push-action@v5
+        with:
+          context: "{{defaultContext}}:api-server"
+          file: Dockerfile
+          platforms: linux/amd64,linux/arm64
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

api-server/Dockerfile

@@ -1,12 +1,19 @@
-# syntax=docker/dockerfile:1.2
-# Alpine
+# syntax=docker/dockerfile:1.6
+
+# golang builder
+FROM golang:1.21 as builder
+WORKDIR /usr/local/src/
+COPY . /usr/local/src/
+RUN make build
+
+# docker image
 FROM alpine
 
-RUN apk --no-cache --no-progress add ca-certificates tzdata git \
+RUN apk --no-cache --no-progress add ca-certificates tzdata \
     && rm -rf /var/cache/apk/*
 
 ARG TARGETPLATFORM
-COPY ./dist/$TARGETPLATFORM/api-server /
+COPY --from=builder /usr/local/src/dist/$TARGETPLATFORM/api-server /
 
 ENTRYPOINT ["/api-server"]
 EXPOSE 3000