add local dev info to readme

Author: SirCotare

readme.md

@@ -80,6 +80,14 @@ The following configuration options are available:
 | `lib.emailservice.scheduling.enabled`  | true        | Enables the scheduler sending the emails.                             |
 | `lib.emailservice.scheduling.interval` | 30000       | Specifies the milliseconds delay between runs of the scheduler.       |
 
+## Local development:
+
+To use this library as a local development dependency, you can simply refer to the version `BUILD-SNAPSHOT`.
+
+Check out this repository and run the maven goal `install`. This will build and install this library as version `BUILD-SNAPSHOT` into your local maven cache.
+
+Note that you may have to tell your IDE to reload your main maven project each time you build the library.
+
 ## Building and releasing a new version:
 
 To create a new version of this package and push it to the maven registry, you will have to use the GitHub actions workflow and manually trigger it.