# build stage
FROM golang:1.16-stretch AS build-env

WORKDIR /src

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

COPY . /src

RUN mkdir -p /webdav/root && chown -R 101:101 /webdav

ENV GO113MODULE=on
RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -ldflags '-extldflags "-static"' -o app .

# cert stage
FROM alpine:latest as certs
RUN apk --update add ca-certificates

 # final stage
FROM scratch
LABEL maintainer="Lennard Brinkhaus <lennard.brinkhaus@dragse.de>"

COPY --from=certs /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt

WORKDIR /app

USER 101

COPY --from=build-env --chown=101:101 /webdav /webdav
COPY --from=build-env /src/app .

ENTRYPOINT [ "./app" ]