simplify confd setup - use another base image

files/Dockerfile

@@ -1,17 +1,5 @@
-FROM golang:1.9-alpine as confd
+FROM eumau/debian:buster-slim
 LABEL maintainer "Mauro Torrez <mauro@mau.ro>"
-# confd -----------------------------------------------------------------------
-ARG CONFD_VERSION=0.16.0
-ADD https://github.com/kelseyhightower/confd/archive/v${CONFD_VERSION}.tar.gz /tmp/
-RUN apk add --no-cache bzip2 make && \
-  mkdir -p /go/src/github.com/kelseyhightower/confd && \
-  cd /go/src/github.com/kelseyhightower/confd && \
-  tar --strip-components=1 -zxf /tmp/v${CONFD_VERSION}.tar.gz && \
-  go install github.com/kelseyhightower/confd && \
-  rm -rf /tmp/v${CONFD_VERSION}.tar.gz
-# end confd -------------------------------------------------------------------
-
-FROM debian:buster-slim
 ARG DEBIAN_FRONTEND=noninteractive
 ENV LC_ALL C
 ENV SUBMISSION_ENABLE= \
@@ -40,8 +28,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   && mkdir -p /ssl && chmod 700 /ssl \
   && cp /etc/ssl/certs/ssl-cert-snakeoil.pem /ssl/cert.pem \
   && cp /etc/ssl/private/ssl-cert-snakeoil.key /ssl/key.pem \
-  && mkdir -p /etc/dovecot/local.d /etc/dovecot/sieve/{before,after} \
-  && mkdir -p /etc/confd/{conf.d,templates}
+  && mkdir -p /etc/dovecot/local.d /etc/dovecot/sieve/{before,after}
 
 ADD 10-mail.conf \
   10-master.conf \
@@ -68,9 +55,4 @@ VOLUME /etc/dovecot /ssl /vmail
 
 EXPOSE 110/tcp 143/tcp 587/tcp 993/tcp 995/tcp 2000/tcp
 
-COPY --from=confd /go/bin/confd /usr/local/bin/confd
-ADD entrypoint.sh /
-RUN chmod +x /entrypoint.sh /usr/local/bin/confd
-
-ENTRYPOINT /entrypoint.sh
 CMD dovecot -F

files/entrypoint.sh

@@ -1,4 +0,0 @@
-#!/bin/bash
-# actualizar templates con confd
-/usr/local/bin/confd -onetime -backend env
-exec ${@}