add hint to run dev server

Author: andrfra

README.md

@@ -51,6 +51,11 @@ To run the test, you need to have Playwright installed locally:
 
 Once you have installed Playwright, you can run the test with the following commands:
 
+```bash
+# start dev server
+$ mvn compile -Denv=dev -Pinclude-mapapps-deps
+```
+
 ```bash
 # run the test
 npm run e2e-test