[Nginx] Add env var for HTTP to HTTPS redirection

docker-compose.yml

@@ -385,6 +385,7 @@ services:
         - SKIP_SOGO=${SKIP_SOGO:-n}
         - SKIP_RSPAMD=${SKIP_RSPAMD:-n}
         - DISABLE_IPv6=${DISABLE_IPv6:-n}
+        - HTTP_REDIRECT=${HTTP_REDIRECT:-n}
         - PHPFPMHOST=${PHPFPMHOST:-}
         - SOGOHOST=${SOGOHOST:-}
         - RSPAMDHOST=${RSPAMDHOST:-}