chore : simplify self-hosting - default to postgres/sqlite

packages/noco-docs/docs/020.getting-started/050.self-hosted/010.installation.md

@@ -72,9 +72,6 @@ If you plan to input some special characters, you may need to change the charact
 :::
 
 
-#### Preview:
-
-<img width="587" alt="image" src="https://user-images.githubusercontent.com/35857179/161526235-5ee0d592-0105-4a57-aa53-b1048dca6aad.png" />
 
 
 

packages/noco-docs/versioned_docs/version-0.109.7/060.FAQs.md

@@ -35,9 +35,9 @@ Node: **v16.14.0**
 Arch: **arm64**
 Platform: **darwin**
 Docker: **false**
-Database: **mysql2**
+Database: **pg**
 ProjectOnRootDB: **true**
-RootDB: **mysql2**
+RootDB: **pg**
 PackageVersion: **0.97.0**
 ```