docs(tsconfig): add note to clarify about extends behavior

Author: latipun7

configs/tsconfig/readme.md

@@ -16,7 +16,7 @@ yarn add -D @latipun7/tsconfig typescript
 
 - NodeJS ESModule target
 
-  ```json
+  ```jsonc
   // tsconfig.json
   {
     "extends": "@latipun7/tsconfig/esm",
@@ -28,7 +28,7 @@ yarn add -D @latipun7/tsconfig typescript
 
 - NextJS apps
 
-  ```json
+  ```jsonc
   // tsconfig.json
   {
     "extends": "@latipun7/tsconfig/next",
@@ -40,7 +40,7 @@ yarn add -D @latipun7/tsconfig typescript
 
 - NodeJS CommonJS target
 
-  ```json
+  ```jsonc
   // tsconfig.json
   {
     "extends": "@latipun7/tsconfig/cjs",
@@ -50,6 +50,10 @@ yarn add -D @latipun7/tsconfig typescript
   }
   ```
 
+**Note**: Since typescript's `extends` has behavior that properties with relative paths found in the configuration file, which aren't excluded from inheritance, will be resolved relative to the configuration file they originated in.
+
+This means, `files`, `include`, `exclude`, and other properties that accept relative path like `compilerOptions.baseUrl`, `compilerOptions.paths`, etc, you need to specify it yourself.
+
 ## Hacking to the Gate~! 🐱‍💻🎶
 
 [MIT License][license-url] © Latif Sulistyo