# Backend tools image: Go + golangci-lint for test, fmt, lint.
# Source is mounted at /src at run time; this WORKDIR is only for build-time go mod download.
FROM golang:1.24-alpine

# v1.64+ required for Go 1.24 (export data format); see https://github.com/golangci/golangci-lint/issues/5225
RUN go install github.com/golangci/golangci-lint/cmd/golangci-lint@v1.64.0

WORKDIR /build
COPY go.mod go.sum ./
RUN go mod download