set up hlaeja JWT

README.md

@@ -7,6 +7,7 @@ In realms of connectedness, where devices roam free, A nexus of management, harm
 | name                   | required | info                    |
 |------------------------|:--------:|-------------------------|
 | spring.profiles.active | ✓  | Spring Boot environment |
+| jwt.public-key         | ✓  | JWT public key file     |
 
 *Required: ✓ can be stored as text, and ✗ need to be stored as secret.*
 
@@ -16,6 +17,12 @@ Run `release.sh` script from `master` branch.
 
 ## Development Information
 
+### Public RSA Key
+
+This service uses the public key from **[Hlæja Account Register](https://github.com/swordsteel/hlaeja-account-registry)** to identify users. To set up user identification for local development, copy the `public_key.pem` file from the `./cert` directory in **Hlæja Account Register** into the `./cert` directory of this project.
+
+*Note: For more information on generating RSA keys, please refer to our [generate RSA key](https://github.com/swordsteel/hlaeja-development/blob/master/doc/rsa_key.md) documentation.*
+
 ### Global Setting
 
 The following global settings are used in Hlaeja Device Registry. You can configure these settings using either Gradle properties or alternatively environment variables.