Merge branch 'fix/pica-mail-mta-opendkim-init-script' into 'master'

ps is needed for opendkim init scripts

See merge request !66

pica-mail/pica-mail-mta/Dockerfile

@@ -8,7 +8,7 @@ ENV DEBIAN_FRONTEND noninteractive
 #installation des paquets debian
 RUN apt-get update -y \
   && apt-get install -y \
-      postfix postfix-ldap libsasl2-modules sasl2-bin opendkim opendkim-tools rsyslog opendmarc ca-certificates \
+      postfix postfix-ldap libsasl2-modules sasl2-bin opendkim opendkim-tools rsyslog opendmarc ca-certificates procps \
   && rm -rf /var/lib/apt/lists/*