# # simple postfix smtp relay # FROM alpine:3.13 # standardized labels LABEL author="Asif Bacchus " LABEL maintainer="Asif Bacchus " LABEL org.label-schema.schema-version="1.0" LABEL org.label-schema.docker.cmd="" LABEL org.label-schema.description="Simple postfix smtp mail relay on Alpine." LABEL org.label-schema.url="https://git.asifbacchus.app/ab-docker/postfix-smtp-relay" LABEL org.label-schema.usage="https://git.asifbacchus.app/ab-docker/postfix-smtp-relay" LABEL org.label-schema.vcs-url="https://git.asifbacchus.app/ab-docker/postfix-smtp-relay.git" # install packages and clean-up RUN apk --no-cache add \ ca-certificates \ postfix \ bind-tools \ && rm -f /var/cache/apk/* # set environment variables ENV TZ=Etc/UTC ENV LOCAL_HOSTNAME="" ENV LOCAL_DOMAINNAME="" ENV LOCAL_ENCRYPTION=false ENV SMARTHOST="" ENV SMARTHOST_PORT=587 ENV SMARTHOST_USERNAME="" ENV SMARTHOST_PASSWORD="" ENV SMARTHOST_ENCRYPTION="OPTIONAL" # copy configuration snippets COPY main.cf.insert /tmp/main.cf.insert COPY entrypoint.sh /usr/local/bin/entrypoint.sh # set entrypoint and default command ENTRYPOINT [ "/usr/local/bin/entrypoint.sh" ] CMD [ "/usr/local/sbin/postfix", "start-fg" ] # set parameters, vendor, version and build-date labels LABEL org.label-schema.docker.params="TZ=Etc/UTC, HOSTNAME=(container hostname), DOMAINNAME=(derived from hostname), LOCAL_ENCRYPTION=false|optional|true, SMARTHOST=..., SMARTHOST_PORT=587, SMARTHOST_USERNAME=..., SMARTHOST_PASSWORD=..., SMARTHOST_ENCRYPTION=optional|false|true" LABEL org.label-schema.vendor="Alpine 3.13, Postfix 3.5.10-r0" LABEL org.label-schema.version="0.5" ARG BUILD_DATE LABEL org.label-schema.build-date=${BUILD_DATE}