feature(scripts): allow providing own config

entrypoint.sh

@@ -8,6 +8,13 @@ convertCase () {
     printf "%s" "$1" | tr "[:lower:]" "[:upper:]"
 }
 
+if [ -f "/etc/postfix/main.cf.override" ]; then
+    # use provided configuration file
+    printf "\nAppending provided MAIN configuration... "
+    cat /etc/postfix/main.cf.override >> /etc/postfix/main.cf
+    \rm -f /tmp/main.cf.insert
+else
+    # process auto-setup
     printf "\nVerifying environment variables... "
 
     # check for missing environment variable values
@@ -65,13 +72,22 @@ case "$SMARTHOST_ENCRYPTION" in
             ;;
     esac
 
+    # append configuration and remove temp file
     cat /tmp/main.cf.insert >> /etc/postfix/main.cf
-rm -f /tmp/main.cf.insert
+    \rm -f /tmp/main.cf.insert
+fi
+printf "done\n"
 
+if [ -f "/etc/postfix/master.cf.override" ]; then
+    # use provided configuration file
+    printf "\nUsing provided MASTER configuration... "
+    \cp --force /etc/postfix/master.cf.override /etc/postfix/master.cf
+else
     # update master.cf
     sed -i 's/#tlsproxy/tlsproxy/' /etc/postfix/master.cf
-
+fi
 printf "done\n"
+
 printf "container setup complete!\n"
 
 # run CMD passed to this container