chore(doc): update readme (#7)

README.md

@@ -8,4 +8,21 @@
 
 This project includes java related libraries, runtimes etc... that is not available in the main mason-registry
 
+## How to Install
+
+- You can add the new registry before the default mason-registry as follows
+- Run `Mason` and wait for mason to update the new registry
+
+```lua
+{
+ 'williamboman/mason.nvim',
+ opts = {
+ registries = {
+ 'github:nvim-java/mason-registry',
+ 'github:mason-org/mason-registry',
+ },
+ },
+}
+```
+
 ## Head on to main project [:coffee: nvim-java](https://github.com/nvim-java/nvim-java)