wip: experimental fetchmail support

.env.sample

@@ -85,6 +85,8 @@ RELAYHOST=
 
 # Enable fetchmail
 FETCHMAIL_ENABLED=False
+#COMPOSE_FILE="$COMPOSE_FILE:compose.fetchmail.yml"
+#FETCHMAIL_ENABLED=True
 
 # Fetchmail delay
 FETCHMAIL_DELAY=600
@@ -116,7 +118,7 @@ COMPRESSION_LEVEL=
 
 # Mailman settings
 # NOTE(3wc): remember to also set RELAYNETS
-#COMPOSE_FILE="compose.yml:compose.mailman.yml"
+#COMPOSE_FILE="$COMPOSE_FILE:compose.mailman.yml"
 #MAILMAN_POSTFIX_OVERRIDES=1
 #MAILMAN_CORE_VOLUME=lists_example_com_mailman-core
 #MAILMAN_CORE_NETWORK=lists_example_com_internal
@@ -126,7 +128,7 @@ COMPRESSION_LEVEL=
 # return-path: https://www.rubydoc.info/gems/actionmailer-rack-upgrade-2/2.3.15/ActionMailer/Base
 # logins and MAIL FROM ownership: http://www.postfix.com/postconf.5.html#smtpd_relay_restrictions
 # there is an open ticket with a further discussion also https://github.com/Mailu/Mailu/issues/1096
-#COMPOSE_FILE="compose.yml:compose.senderlogins.yml"
+#COMPOSE_FILE="$COMPOSE_FILE:compose.senderlogins.yml"
 #SENDER_LOGINS_POSTFIX_OVERRIDES=1
 
 SECRET_SECRET_KEY_VERSION=v1

compose.fetchmail.yml

@@ -0,0 +1,14 @@
+
+services:
+  fetchmail:
+    image: ghcr.io/mailu/fetchmail:2.0.34
+    environment: *default-env
+    volumes:
+      - "fetchmail:/data"
+    depends_on:
+      - app
+    networks:
+      - default
+
+volumes:
+  fetchmail:

compose.yml

@@ -18,6 +18,7 @@ x-environment:
   - DMARC_RUF
   - DOCKER_CONTEXT
   - DOMAIN
+  - FETCHMAIL_ENABLED
   - FETCHMAIL_DELAY
   - FULL_TEXT_SEARCH
   - HOSTNAMES