fix: complete readme

Author: Alain Boudard

README.md

@@ -7,5 +7,40 @@ This is a demo project for Spring Boot with Module Federation and Angular.
 The project hosts a single Spring Boot application.
 The `/application` folder contains the Angular application.
 The `/library` folder contains a micro frontend application.
+The `/core` folder contains a shared library, both Java and Angular
 
 When both application are built, the Spring Boot application will serve the Angular application and the micro frontend application.
+
+### Install the local core library
+
+The easy way to install core library is having a local `verdaccio` server :
+
+`npm i verdaccio -g`
+
+Then you simply go to the `core/ng-core` project and publish the library on the default port :
+
+`"publish:core:local": "ng build core && cd dist/core && npm publish --registry http://localhost:4873/"`
+
+### Install the core library on both shell and mfe1
+
+You simply install core from local registry :
+
+`npm i core --registry http://localhost:4873/`
+
+Do it on both Angular applications.
+
+### Build the shell and the mfe1
+
+Both projects are configured to be built in the appropriate public Spring folder.
+So you simply run build scripts :
+
+```
+"build:shell": "ng build --base-href /ng-shell/ --configuration production",
+"build:mfe1": "ng build --base-href /ng-shell/mfe1/ --configuration production",
+```
+
+### Run Spring Boot application
+
+Run ShellApplication Java class.
+You just need to run the application with the proper argument as base path :
+`--server.servlet.context-path=/ng-shell`