Use env vars

src/vite-env.d.ts

@@ -7,3 +7,18 @@
  */
 
 /// <reference types="vite/client" />
+
+interface ViteTypeOptions {
+    // By adding this line, you can make the type of ImportMetaEnv strict
+    // to disallow unknown keys.
+    strictImportMetaEnv: unknown;
+}
+
+interface ImportMetaEnv {
+    readonly VITE_SERVER_URL_DEFAULT: string;
+    // more env variables...
+}
+
+interface ImportMeta {
+    readonly env: ImportMetaEnv;
+}