Update Keycloakify

vite.config.ts

@@ -5,12 +5,42 @@ import react from '@vitejs/plugin-react'
 import commonjs from "vite-plugin-commonjs";
 import { keycloakify } from "keycloakify/vite-plugin";
 
+
 // https://vitejs.dev/config/
 export default defineConfig({
   plugins: [
     react(), 
     commonjs(), 
-    keycloakify()
+    keycloakify({
+      themeName: "keycloakify-starter",
+      extraThemeProperties: [
+        "foo=bar"
+      ],
+      // This is a hook that will be called after the build is done
+      // but before the jar is created.  
+      // You can use it to add/remove/edit your theme files.  
+      postBuild: async keycloakifyBuildOptions => {
+
+        const fs = await import("fs/promises");
+        const path = await import("path");
+
+        await fs.writeFile(
+          path.join(keycloakifyBuildOptions.keycloakifyBuildDirPath, "foo.txt"),
+          Buffer.from(
+            [
+            "This file was created by the postBuild hook of the keycloakify vite plugin", 
+            "",
+            "Resolved keycloakifyBuildOptions:",
+            "",
+            JSON.stringify(keycloakifyBuildOptions, null, 2),
+            ""
+            ].join("\n"),
+            "utf8"
+          )
+        );
+
+      }
+    })
   ],
   /* 
    * Uncomment this if you want to use the default domain provided by GitHub Pages