Dockerfile

# syntax=docker/dockerfile:experimental
FROM golang:1.22-alpine3.20 AS base

RUN apk add --no-cache git

WORKDIR /app
COPY go.* ./
RUN go mod download
COPY . .
RUN go mod tidy

FROM base as lint
RUN go install github.com/golangci/golangci-lint/cmd/golangci-lint@v1.50.0
RUN /go/bin/golangci-lint run --timeout 10m0s ./... || true

FROM base as test
RUN go test -v -coverprofile=cover.out ./... || true
RUN go tool cover -func=cover.out

FROM base as builder
RUN CGO_ENABLED=0 GOOS=linux go build -o main cmd/server/main.go

FROM alpine:3.20

RUN addgroup -S appgroup && adduser -S appuser -G appgroup

WORKDIR /app
RUN touch .env && chown appuser:appgroup .env

COPY --from=builder /app/main .
RUN chown appuser:appgroup main

USER appuser

HEALTHCHECK NONE

CMD ["./main"]