Golang microservice gitlab-ci

.dockerignore

.git
.dockerignore
LICENSE
README.md
.gitignore
Dockerfile
docker-compose.yml
.DS_Store
/target
.vscode
/.gopath-cache/**
!/.gopath-cache/pkg/**

.gitlab-ci.yml

variables:
  CONTAINER_NAME: $CI_REGISTRY_IMAGE

cache:
  key: ${CI_COMMIT_REF_SLUG}
  paths:
    - .gopath-cache

stages:
  - build
  - lint-test

lint-test:
  image: golang:1.12.7
  stage: lint-test
  except:
    - master
  before_script:
    - mkdir -p .gopath-cache
    - export GOPATH="$CI_PROJECT_DIR/.gopath-cache"
    - export PATH="$PATH:$GOPATH/bin"
    - go mod download
  script:
    - GO111MODULE=off go get github.com/golangci/golangci-lint/cmd/golangci-lint
    - make lint
    - make test

build-docker:
  image: docker:stable
  services:
  - docker:dind
  stage: build
  when: manual
  script:
    - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
    - docker pull $CONTAINER_NAME:latest || true
    - docker build --cache-from $CONTAINER_NAME:latest -t $CONTAINER_NAME:latest .
    - docker push $CONTAINER_NAME:latest

Dockerfile

FROM golang:1.12.7-alpine as builder
WORKDIR /app
COPY . .
# for ci cache
ENV GOPATH=/app/.gopath-cache
# golang-alpine dont includes git lol
RUN apk add --no-cache git
RUN CGO_ENABLED=0 GOOS=linux go build -o main .

############################

FROM scratch
WORKDIR /app
COPY --from=builder /app/main ./main
CMD ["./main"]