Dockerfile

FROM golang:alpine AS build

ENV CGO_ENABLED=0

WORKDIR /src
COPY . .
RUN go build -o yhoard ./cmd/yhoard

FROM alpine:latest

ARG USER=yhoard
ARG GROUP=yhoard
ARG UID=1111
ARG GID=2222

ENV XDG_CONFIG_HOME=/config
ENV YHOARD_CONFIG=/config/config.yaml
ENV YHOARD_OUTPUT_DIR=/data

RUN apk add -U --no-cache ca-certificates tini \
    && mkdir -p /data $XDG_CONFIG_HOME \
    && addgroup --gid $GID $GROUP \
    && adduser -D -H --gecos "" \
                     --home "/home" \
                     --ingroup "$GROUP" \
                     --uid "$UID" \
                     "$USER" \
    && chown -R $USER:$GROUP /home /data $XDG_CONFIG_HOME \
    && rm -rf /tmp/* /var/{cache,log}/* /var/lib/apt/lists/*

USER $USER
WORKDIR /data

COPY --from=build --chown=$USER:$GROUP /src/sample-config.yaml /config/config.yaml
COPY --from=build --chown=$USER:$GROUP /src/yhoard /usr/local/bin/

VOLUME /data

ENTRYPOINT ["/sbin/tini", "--", "yhoard"]
CMD ["--help"]