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Docker

# syntax=docker/dockerfile:1.4
FROM --platform=$BUILDPLATFORM golang:1.18-alpine AS builder
WORKDIR /code
ENV CGO_ENABLED 0
ENV GOPATH /go
ENV GOCACHE /go-build
COPY go.mod go.sum ./
RUN --mount=type=cache,target=/go/pkg/mod/cache \
go mod download
COPY . .
RUN --mount=type=cache,target=/go/pkg/mod/cache \
--mount=type=cache,target=/go-build \
go build -o bin/backend main.go
CMD ["/code/bin/backend"]
FROM builder as dev-envs
RUN <<EOF
apk update
apk add git
EOF
RUN <<EOF
addgroup -S docker
adduser -S --shell /bin/bash --ingroup docker vscode
EOF
# install Docker tools (cli, buildx, compose)
COPY --from=gloursdocker/docker / /
CMD ["go", "run", "main.go"]
FROM scratch
COPY --from=builder /code/bin/backend /usr/local/bin/backend
CMD ["/usr/local/bin/backend"]