update README

docker/docker-compose.yml

@@ -1,14 +1,6 @@
 version: '3.1'
 
 services:
-    mongo:
-        image: mongo
-        ports:
-            - '27017:27017'
-        restart: always
-        environment:
-            - MONGO_INITDB_DATABASE=flowiseai
-
     flowise:
         image: flowiseai/flowise
         restart: always
@@ -16,8 +8,6 @@ services:
             - PORT=${PORT}
         ports:
             - '${PORT}:${PORT}'
-        links:
-            - mongo
         volumes:
             - ~/.flowise:/root/.flowise
         command: /bin/sh -c "sleep 3; flowise start"