docs : env variables

Signed-off-by: Naveen MR <oof1lab@gmail.com>

packages/noco-docs/content/en/setup-and-usages/sync-schema.md

@@ -0,0 +1,18 @@
+---
+title: 'Sync Schema'
+description: 'Schema changes made to database from outside nocodb GUI can be synced'
+position: 70
+category: 'Usage'
+menuTitle: 'Sync Schema'
+---
+
+## How to sync schema changes to NocoDB.
+NocoDB allows you to sync schema changes if you have made changes outside nocodb GUI. However, it has to be noted then you will have tobring your own
+schema migrations for moving from environment to other.
+
+Below are the steps to sync schema changes.
+
+## Example 
+- Please note there are 3 tables in schema. 
+
+- And NocoDB has just 2 tables.