d894012af6
- Use scratch base image (< 20MB final vs ~50MB alpine) - Add BuildKit cache for go modules and build cache - Selective COPY (cmd, internal, migrations, docs) instead of COPY . . - Remove HEALTHCHECK (not supported by Podman OCI) - Update .gitignore with more binary patterns - Optimize .dockerignore to exclude tests and binaries
59 lines
1.9 KiB
Docker
59 lines
1.9 KiB
Docker
# =============================================================================
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# GoHorse Jobs Backend - Ultra-Optimized Dockerfile
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# Target: < 20MB final image (scratch-based)
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# =============================================================================
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# syntax=docker/dockerfile:1
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# -----------------------------------------------------------------------------
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# Stage 1: Build (with cache mounts)
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# -----------------------------------------------------------------------------
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FROM mirror.gcr.io/library/golang:1.24-alpine AS builder
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WORKDIR /build
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# Install build deps (minimal)
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RUN apk add --no-cache git ca-certificates tzdata
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# Cache go modules (separate layer for better caching)
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COPY go.mod go.sum ./
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RUN --mount=type=cache,target=/go/pkg/mod \
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go mod download && go mod verify
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# Copy source
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COPY cmd ./cmd
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COPY internal ./internal
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COPY migrations ./migrations
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COPY docs ./docs
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# Build with maximum optimizations:
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# - CGO_ENABLED=0: Pure Go binary (no C deps)
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# - ldflags -s -w: Strip debug info (-4MB)
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# - trimpath: Remove local paths
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# - -a: Rebuild all packages
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RUN --mount=type=cache,target=/go/pkg/mod \
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--mount=type=cache,target=/root/.cache/go-build \
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CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build \
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-ldflags="-s -w -X main.Version=$(git describe --tags --always 2>/dev/null || echo 'dev')" \
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-trimpath \
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-o /app/main ./cmd/api
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# -----------------------------------------------------------------------------
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# Stage 2: Production (scratch for minimal size)
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# -----------------------------------------------------------------------------
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FROM scratch AS runner
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# Copy essentials from builder
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COPY --from=builder /usr/share/zoneinfo /usr/share/zoneinfo
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COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
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# Copy binary and migrations
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COPY --from=builder /app/main /main
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COPY --from=builder /build/migrations /migrations
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# Environment
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ENV PORT=8521 \
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TZ=America/Sao_Paulo
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EXPOSE 8521
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ENTRYPOINT ["/main"]
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