Dockerfile

# syntax=docker/dockerfile:1
ARG ALPINE_VERSION=3.21
ARG GO_VERSION=1.25

FROM --platform=$BUILDPLATFORM golang:${GO_VERSION}-alpine${ALPINE_VERSION} AS builder

RUN apk add --no-cache git make
ENV CGO_ENABLED=0
ENV GOTOOLCHAIN=auto

WORKDIR /build

# Cache Go dependencies
COPY go.mod go.sum ./
RUN --mount=type=cache,target=/go/pkg/mod \
    go mod download

COPY . .

# Set build args for cross-compilation
ARG TARGETOS
ARG TARGETARCH
ENV GOOS=$TARGETOS
ENV GOARCH=$TARGETARCH

# Build with caching
RUN --mount=type=cache,target=/go/pkg/mod \
    --mount=type=cache,target=/root/.cache/go-build \
    make

FROM alpine:${ALPINE_VERSION}

RUN apk add --no-cache ca-certificates docker-credential-ecr-login
COPY --from=builder /build/build/dockyard /usr/local/bin/dockyard

EXPOSE 5000

ENTRYPOINT ["dockyard"]
CMD ["server"]