chore: documentation of data sources with ssl

packages/noco-docs/docs/100.data-sources/020.connect-to-data-source.md

@@ -1,7 +1,7 @@
 ---
 title: 'Connect to a Data source'
 description: 'Learn how to connect to an external data-source (PG/MySQL) in NocoDB.'
-tags: ['Data Sources', 'Connect', 'External', 'PG', 'MySQL']
+tags: ['Data Sources', 'Connect', 'External', 'PG', 'MySQL', 'mtls', 'tls', 'ssl']
 keywords: ['NocoDB data source', 'connect data source', 'external data source', 'PG data source', 'MySQL data source']
 ---
 
@@ -23,6 +23,14 @@ To connect to an external data source, follow the steps below:
    | Database      | Name of the database to connect to                                                   |
    | Schema name   | Name of the schema to connect to                                                     |
 
+4a. Optionally, if the connection required is TLS/MTLS for MITM protection, follow these additional steps below:
+
+   - Click on `SSL & Advanced Parameters`, \
+   - Select `SSL Mode` and upload the client certificate, client key, and Root CA files by clicking on the file.    
+   \
+   Note: The entire connection parameters can be viewed in json form by clicking on the "Edit connection JSON" and edited as required by database server type.\
+   Example: In PostgreSQL with SSL mode set to "Required-Identity," if the server certificate's common name (cname) differs from the actual DNS/IP used for connection, the connection may fail. To resolve this, add a "servername" property with the cname value under the SSL section, along with certificate information. Additional details are available in the Knex configuration options.[knex configuration options](https://knexjs.org/guide/#configuration-options)
+   
 5. Click on `Test Database Connection` button to verify the connection
 6. Wait for the connection to be verified.   
 - After connection is successful, `Submit` button will be enabled.