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