Builds go vroom vroom

.dockerignore

@@ -1,5 +1,6 @@
 /.dockerignore
 /Dockerfile
+/Dockerfile.buildkit
 /.git/
 /.github/
 /.gitignore

.github/workflows/docker.yml

@@ -45,4 +45,5 @@ jobs:
           --build-arg DATE=${DATE} \
           -t ${GITHUB_REPOSITORY}:${GITHUB_SHA} \
           -t ${GITHUB_REPOSITORY}:${REF} \
+          -f Dockerfile.buildkit
           ${OTHER_TAGS} .

.github/workflows/lint.yml

@@ -10,16 +10,11 @@ jobs:
     - name: Lint the codebase
       run: |
         docker run --rm -v $(pwd):/app -w /app golangci/golangci-lint:v1.27.0 golangci-lint run -E goimports
-    - name: Set up Docker Buildx
-      uses: crazy-max/ghaction-docker-buildx@v1
-      with:
-        version: latest
     - name: Build and the Docker images
       run: |
         DATE="$(date -u +%Y-%m-%dT%H:%M:%SZ)"
 
-        docker buildx build \
-          --platform linux/arm/v7,linux/arm64,linux/amd64 \
+        docker build \
           --cache-from ${GITHUB_REPOSITORY}-cache \
           --build-arg VERSION=${GITHUB_SHA} \
           --build-arg COMMIT=${GITHUB_SHA} \

Dockerfile.buildkit

@@ -0,0 +1,40 @@
+FROM --platform=$BUILDPLATFORM golang:1.14-alpine as builder
+LABEL maintainer="Antonio Mika <me@antoniomika.me>"
+
+ENV GOCACHE /gocache
+ENV CGO_ENABLED 0
+
+WORKDIR /app
+
+RUN apk add --no-cache git ca-certificates
+
+COPY go.mod .
+COPY go.sum .
+
+RUN go mod download
+
+COPY . .
+
+ARG VERSION=dev
+ARG COMMIT=none
+ARG DATE=unknown
+
+ARG TARGETOS
+ARG TARGETARCH
+
+ENV GOOS=${TARGETOS} GOARCH=${TARGETARCH}
+
+RUN go build -o /go/bin/sish -ldflags="-s -w -X github.com/antoniomika/sish/cmd.Version=${VERSION} -X github.com/antoniomika/sish/cmd.Commit=${COMMIT} -X github.com/antoniomika/sish/cmd.Date=${DATE}"
+
+FROM scratch as release
+LABEL maintainer="Antonio Mika <me@antoniomika.me>"
+
+WORKDIR /app
+
+COPY --from=builder /tmp /tmp
+COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+COPY --from=builder /app/deploy/pubkeys /app/deploy/pubkeys
+COPY --from=builder /app/templates /app/templates
+COPY --from=builder /go/bin/sish /app/sish
+
+ENTRYPOINT ["/app/sish"]