FROM docker.io/golang:1.25.4-alpine AS build

RUN apk add --no-cache upx

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

COPY . .
RUN go tool gotailwind -i assets/css/input.css -o assets/css/output.css --minify
RUN --mount=type=cache,target=/root/.cache/go-build \
    CGO_ENABLED=0 go build -ldflags="-s" -o /bin/c4 .
RUN upx -9 -k /bin/c4

FROM scratch
ENV PORT=8080
COPY --from=build /bin/c4 /
ENTRYPOINT ["/c4"]