add docker build and publish step

.github/workflows/go.yml

@@ -24,11 +24,30 @@ jobs:
       run: |
         sudo apt-get install -y ledger
 
-    - name: Build
-      run: go build -v ./...
-
     - name: Test
       run: go test -v ./...
       env:
         GITHUB_URL: ${{ secrets.GIT_URL }}
         GITHUB_TOKEN: ${{ secrets.GIT_ACCESS_TOKEN }}
+
+    - name: set up Docker Buildx
+      id: buildx
+      uses: docker/setup-buildx-action@v3
+
+    - name: build and publish image
+      if: ${{ github.ref == 'refs/heads/main' }}
+      env:
+        DOCKER_HUB_USER: ${{ secrets.DOCKER_HUB_USER }}
+        DOCKER_HUB_TOKEN: ${{ secrets.DOCKER_HUB_TOKEN }}
+        GITHUB_SHA: ${{ github.sha }}
+        GITHUB_REF: ${{ github.ref }}
+      run: |
+        ref="$(echo ${GITHUB_REF} | cut -d'/' -f3)"
+        version=${ref}-${GITHUB_SHA:0:7}-$(date -u +%Y-%m-%dT%H:%M:%S)
+        echo "GITHUB_REF=${GITHUB_REF}, GITHUB_SHA=${GITHUB_SHA}, GIT_BRANCH=${ref}"
+        echo "version=${version}"
+        echo ${DOCKER_HUB_TOKEN} | docker login -u ${DOCKER_HUB_USER} --password-stdin
+        docker buildx build --push \
+            --build-arg VERSION=${version} \
+            --platform linux/amd64,linux/arm/v7,linux/arm64 \
+            -t ${DOCKER_HUB_USER}/teledger:${ref} .

Dockerfile

@@ -0,0 +1,19 @@
+FROM golang:1.22.0-alpine as build
+
+
+ADD ./ /repo
+WORKDIR /repo
+
+ARG VERSION=docker-dev
+RUN echo go version: `go version`
+RUN echo build version: ${VERSION}
+
+RUN go build -o teledger -ldflags "-X main.version=${version} -s -w" ./app/main.go
+
+FROM golang:1.22.0-alpine
+
+WORKDIR /srv
+RUN apk add --no-cache ledger=~3.3.2 && echo ledger: `which ledger`
+COPY --from=build /repo/teledger /srv/teledger
+
+CMD ["/srv/teledger"]