non-root postfix and dovecot

Author: namachan10777

dovecot/Dockerfile

@@ -1,5 +1,11 @@
 FROM ubuntu:noble
-
+ARG POSTFIX_UID=4005
+ARG POSTFIX_GID=4005
+ARG DOVECOT_UID=4006
+ARG DOVECOT_GID=4006
 RUN apt-get update && apt-get install -qy dovecot-core dovecot-imapd
+RUN useradd -u $POSTFIX_UID -g $POSTFIX_GID -s /bin/false postfix
+RUN useradd -u $DOVECOT_UID -g $DOVECOT_GID -s /bin/false dovecot
+USER dovecot
 
 CMD [ "/usr/sbin/dovecot", "-F" ]

postfix/Dockerfile

@@ -1,5 +1,12 @@
 FROM ubuntu:noble
 
-RUN apt-get update && apt-get install -qy postfix
+ARG POSTFIX_UID=4005
+ARG POSTFIX_GID=4005
+ARG DOVECOT_UID=4006
+ARG DOVECOT_GID=4006
+RUN apt-get update && apt-get install -qy postfix dovecot-core dovecot-imapd
+RUN useradd -u $POSTFIX_UID -g $POSTFIX_GID -s /bin/false postfix
+RUN useradd -u $DOVECOT_UID -g $DOVECOT_GID -s /bin/false dovecot
+USER postfix
 
 CMD [ "/usr/sbin/postfix" "start-fg" ]