Add table of contents

README.md

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 # loopback4-migration
 
 [![Actions Status][build-badge]][actions]
@@ -16,6 +17,18 @@ It provides a common interface to implement custom migration scripts and automat
 the versioning of the database and the execution of the scripts based on the application version
 compared to the database version.
 
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+## Contents
+
+- [Prerequisites](#prerequisites)
+- [Installation](#installation)
+- [Usage](#usage)
+- [Example](#example)
+- [Configuration](#configuration)
+- [Related resources](#related-resources)
+- [Contributing](#contributing)
+- [License](#license)
+
 ## Prerequisites
 
 Some dependencies need to be installed as peer dependencies
@@ -41,6 +54,7 @@ of [manual configuration](#configuration).
 npm install loopback4-migration
 ```
 
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 ### Bind the component in `application.ts`
 
 This will add the required model, repository and further artifacts to the application. By default,
@@ -150,6 +164,7 @@ export class MigrationScript101 implements MigrationScript {
 
 The component can be configured in `application.ts` to overwrite the default values.
 
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 ### Update default values
 
 - `appVersion` - The application version retrieved from `package.json` can either be overwritten with
@@ -188,6 +203,7 @@ export class MyApplication extends BootMixin(
 }
 ```
 
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 ### Update directory and naming convention
 
 It is also possible to update the default directory and file extension by changing the `bootOptions`