FROM alpine

# Environment Variables
ENV RELAY_HOST=${RELAY_HOST} \
    RELAY_PORT=${RELAY_PORT} \
    RELAY_USER=${RELAY_USER} \
    RELAY_PASSWORD=${RELAY_PASSWORD} \
    SENDER_DOMAIN=${SENDER_DOMAIN}

## Install
RUN apk add --update postfix

## Run
EXPOSE 25
ADD files/run.sh /run.sh
ENTRYPOINT ["/bin/sh", "/run.sh"]