Adding missing env var in workers

backend/docker-compose.yml

@@ -45,6 +45,7 @@ services:
       - "redis"
       - "backend"
     environment:
+      messenger_default_api: "${messenger_default_api}"
       smtp_server: "${smtp_server}"
       smtp_sender: "${smtp_sender}"
       smtp_login: "${smtp_login}"
@@ -63,6 +64,7 @@ services:
       - "redis"
       - "backend"
     environment:
+      messenger_default_api: "${messenger_default_api}"
       smtp_server: "${smtp_server}"
       smtp_sender: "${smtp_sender}"
       smtp_login: "${smtp_login}"
@@ -82,6 +84,7 @@ services:
       - "redis"
       - "backend"
     environment:
+      messenger_default_api: "${messenger_default_api}"
       smtp_server: "${smtp_server}"
       smtp_sender: "${smtp_sender}"
       smtp_login: "${smtp_login}"