Go docker example

Dockerfile

FROM golang:1.21 AS builder

ARG VERSION
ARG BUILD_TIME

RUN git config --global url."git@github.com:".insteadOf "https://github.com/"
ENV GOPRIVATE=github.com/company/private-repo

RUN mkdir -p -m 0600 ~/.ssh && ssh-keyscan github.com >> ~/.ssh/known_hosts

ADD go.mod go.sum deps/deps.go /deps/
WORKDIR /deps

RUN --mount=type=ssh \
    --mount=type=cache,target=/go/pkg/mod \
    --mount=type=cache,target=/root/.cache/go-build \
    go mod download && \
    go build -v -o deps .

ADD / /src
WORKDIR /src
RUN mkdir /target

ENV CGO_ENABLED=0
RUN --mount=type=cache,target=/go/pkg/mod \
    --mount=type=cache,target=/root/.cache/go-build \
    go build -ldflags="-X main.revision=${VERSION} -X main.buildTime=${BUILD_TIME} -w -s" -v -o /target/app main.go

FROM alpine:latest AS runtime
COPY --from=builder /target/app /
WORKDIR /
CMD ["./app"]