Update env example file.

.env.example

@@ -1,7 +1,6 @@
 APP_ENV=production
 APP_DEBUG=false
-APP_FORCE_SSL=false
-APP_FORCE_ROOT=
+APP_NAME=FireflyIII
 APP_KEY=SomeRandomStringOf32CharsExactly
 APP_LOG=daily
 APP_LOG_LEVEL=warning
@@ -28,7 +27,7 @@ REDIS_PASSWORD=null
 REDIS_PORT=6379
 
 MAIL_DRIVER=smtp
-MAIL_HOST=mailtrap.io
+MAIL_HOST=smtp.mailtrap.io
 MAIL_PORT=2525
 MAIL_FROM=changeme@example.com
 MAIL_USERNAME=null
@@ -50,7 +49,7 @@ USE_ENCRYPTION=true
 
 PUSHER_KEY=
 PUSHER_SECRET=
-PUSHER_APP_ID=
+PUSHER_ID=
 
 DEMO_USERNAME=
 DEMO_PASSWORD=