feat(docs): update readme(add Update a pending connection)

Author: yicr

README.md

@@ -2,6 +2,21 @@
 
 This AWS CDK Construct provides a custom resource (Lambda Function) to create a connection host for Self-Managed GitLab, which is not yet supported by CloudFormation. Additionally, even after creating the Host and the connection, authentication must be done via a browser.
 
+## Install
+
+### TypeScript
+
+#### install by npm
+
+```shell
+npm install @gammarers/aws-codeconnections-host-custom-resource
+```
+
+#### install by yarn
+
+```shell
+yarn add @gammarers/aws-codeconnections-host-custom-resource
+```
 
 ## Example
 
@@ -24,6 +39,34 @@ new codeconnections.CfnConnection(this, 'Connection', {
 
 ```
 
+## How to complete (Update a pending connection)
+
+Deploy completed after being configured in EXAMPLE.
+At this point, the status is ‘Pending’ as shown below because authentication has not yet been completed.
+
+<img alt="CodeConnection Setup 01" src="images/CodeConnection-Setup-01.png" width="800" />
+
+Select the ‘Connection’ you have created to display the Connection detail screen.
+
+<img alt="CodeConnection Setup 02" src="images/CodeConnection-Setup-02.png" width="800" />
+
+You will see the ‘Pending’ status as follows. Select ‘Update pending connection’.
+
+<img alt="CodeConnection Setup 03" src="images/CodeConnection-Setup-03.png" width="800" />
+
+A screen to enter the Provide personal access token (pat) will be displayed; the pat should be created in the target host environment (only api should be enabled). Enter the pat and select ‘Continue’.
+
+<img alt="CodeConnection Setup 04" src="images/CodeConnection-Setup-04.png" width="500" />
+
+The host authorisation screen will appear as shown below, select ‘Authorise’ (the screen will pop up).
+> If you have not logged in, a login screen will be displayed, please log in.
+
+<img alt="CodeConnection Setup 05" src="images/CodeConnection-Setup-05.png" width="800" />
+
+When completed, the status will change to ‘Available’ as follows. This completes all Connection settings.
+
+
+
 ## License
 
 This project is licensed under the Apache-2.0 License.