add frontend env variables in docker .env

.env.example

@@ -19,10 +19,7 @@ FORCE_CLONE=false
 USER_ID=1000
 GROUP_ID=1000
 
-
-
 VITE_API_URL=http://localhost:80
-
 VITE_BROADCASTER=reverb
 VITE_REVERB_KEY=local
 VITE_REVERB_HOST=127.0.0.1
@@ -32,4 +29,3 @@ VITE_DISABLE_STATS=true
 VITE_ENCRYPTED=false
 VITE_CLUSTER=mt1
 VITE_ENABLED_TRANSPORTS=['ws','wss']
-