ARG GOVERSION=latest
FROM golang:$GOVERSION AS builder

WORKDIR /src
COPY . .

ENV CGO_ENABLED=0
ENV BUILD_HOST=syncthing.net
ENV BUILD_USER=docker
RUN rm -f syncthing && go run build.go -no-upgrade build syncthing

FROM alpine

EXPOSE 8384 22000/tcp 22000/udp 21027/udp

VOLUME ["/var/syncthing"]

RUN apk add --no-cache ca-certificates curl libcap su-exec tzdata

COPY --from=builder /src/syncthing /bin/syncthing
COPY --from=builder /src/script/docker-entrypoint.sh /bin/entrypoint.sh

ENV PUID=1000 PGID=1000 HOME=/var/syncthing

HEALTHCHECK --interval=1m --timeout=10s \
  CMD curl -fkLsS -m 2 127.0.0.1:8384/rest/noauth/health | grep -o --color=never OK || exit 1

ENV STGUIADDRESS=0.0.0.0:8384
RUN chmod 755 /bin/entrypoint.sh
ENTRYPOINT ["/bin/entrypoint.sh", "/bin/syncthing", "-home", "/var/syncthing/config"]