Docker setup for Go app

Dockerfile

FROM golang:1.21-alpine as compiler

ARG DOCKER_GIT_CREDENTIALS_GITHUB

ENV CGO_ENABLED=0

COPY . /tmp/src
WORKDIR /tmp/src

RUN apk --no-cache add git~=2 ca-certificates~=20230506 && \
    echo ${DOCKER_GIT_CREDENTIALS_GITHUB} >> ~/.git-credentials && \
    git config --global credential.helper store && \
    go build -o /tmp/app .

FROM scratch

COPY --from=compiler /tmp/app /
COPY --from=compiler /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/

EXPOSE 8080
ENTRYPOINT ["/app"]