git subrepo commit (merge) mailcow/src/mailcow-dockerized

subrepo: subdir:   "mailcow/src/mailcow-dockerized"
  merged:   "2866fb80"
upstream: origin:   "https://github.com/mailcow/mailcow-dockerized.git"
  branch:   "master"
  commit:   "a366494c"
git-subrepo: version:  "0.4.6"
  origin:   "???"
  commit:   "???"
Change-Id: I26ce31f84c1ff9e905669570f9fc7eb754ce6c1c
diff --git a/mailcow/src/mailcow-dockerized/docker-compose.yml b/mailcow/src/mailcow-dockerized/docker-compose.yml
index 2fb0441..040e530 100644
--- a/mailcow/src/mailcow-dockerized/docker-compose.yml
+++ b/mailcow/src/mailcow-dockerized/docker-compose.yml
@@ -352,7 +352,7 @@
         - sogo-mailcow
         - php-fpm-mailcow
         - redis-mailcow
-      image: nginx:1.19-alpine
+      image: nginx:mainline-alpine
       dns:
         - ${IPV4_NETWORK:-172.22.1}.254
       command: /bin/sh -c "envsubst < /etc/nginx/conf.d/templates/listen_plain.template > /etc/nginx/conf.d/listen_plain.active &&