Build and publish container image

Author: marcwickenden

.github/workflows/docker.yaml

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+name: Build and Push Container Image
+on: [push]
+env:
+  IMAGE_NAME: ghcr.io/4armed/metacreds
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Login to GitHub Container Registry
+        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u ${{ github.actor }} --password-stdin
+      - name: Get version
+        id: vars
+        run: echo ::set-output name=tag::$(echo ${GITHUB_SHA} | cut -c1-7)
+      - name: Build the tagged Docker image
+        run: docker build . -f build/Dockerfile --tag ${{ env.IMAGE_NAME }}:${{steps.vars.outputs.tag}} --build-arg EXECUTABLE=metacreds
+      - name: Push the tagged Docker image
+        run: docker push ${{ env.IMAGE_NAME }}:${{steps.vars.outputs.tag}}
+      - name: Tag image as latest
+        run: docker tag ${{ env.IMAGE_NAME }}:${{steps.vars.outputs.tag}} ${{ env.IMAGE_NAME }}:latest
+      - name: Push latest
+        run: docker push ${{ env.IMAGE_NAME }}:latest

Makefile

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+EXECUTABLE := $(EXECUTABLE)
+
+clean:
+	@rm -f ${EXECUTABLE}
+
+install: clean
+	go install -a -tags netgo -ldflags "-w -extldflags '-static'"
+
+docker:
+	docker build -f build/Dockerfile . -t ${EXECUTABLE} --build-arg EXECUTABLE=$(EXECUTABLE)

build/Dockerfile

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+FROM golang:1.17-alpine AS build
+
+ENV CGO_ENABLED=0
+
+RUN apk add --no-cache \
+      git \
+      curl \
+      make
+
+WORKDIR /src
+COPY . .
+RUN make install
+
+FROM gcr.io/distroless/base
+
+ARG EXECUTABLE
+ENV EXECUTABLE=$EXECUTABLE
+
+COPY --from=build /go/bin/${EXECUTABLE} /metacreds
+ENTRYPOINT ["/metacreds"]