Golang - multistage docker images

README.md

How to build and run sources

build image from latest sources

docker build .
run sources (from docker container, will be deleted after exits)

# --rm deletes container after it exits
# -t for tty
# -i for interactive

docker run --rm -ti maxfunke/go-training

Dockerfile

# Multistage build
FROM golang:alpine as build

## stage1: build app, make use of /go/src
RUN mkdir /go/src/app
WORKDIR /go/src/app
## copy sources to build-image
ADD ./src/main.go /go/src/app 
RUN go build -o /bin/app

## stage2: copy built bin to plain-image
FROM scratch
COPY --from=build /bin/app /bin/app
ENTRYPOINT ["/bin/app"]