rack-gateway/Dockerfile.gateway-dev at main · DocSpring/rack-gateway · GitHub

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FROM golang:1.26.2-alpine AS builder

RUN apk add --no-cache git ca-certificates make gcc musl-dev

WORKDIR /app

# Cache go mod download
COPY go.mod go.sum ./
COPY internal/shims ./internal/shims
RUN --mount=type=cache,target=/go/pkg/mod,sharing=locked \
    --mount=type=cache,target=/root/.cache/go-build,sharing=locked \
    go mod download

# Copy only the source needed to build the gateway
COPY internal ./internal
COPY cmd/gateway ./cmd/gateway

# Build the gateway binary directly in this stage
RUN --mount=type=cache,target=/go/pkg/mod,sharing=locked \
    --mount=type=cache,target=/root/.cache/go-build,sharing=locked \
    CGO_ENABLED=0 go build -o /out/rack-gateway-api ./cmd/gateway \
    && /out/rack-gateway-api help

FROM alpine:latest

RUN apk --no-cache add ca-certificates curl

WORKDIR /root/

COPY --from=builder /out/rack-gateway-api .

EXPOSE 8080

CMD ["./rack-gateway-api"]