✨ Make new frontend available under /modern

👷 Start adding deploy config and CI

frontend/src/typings.d.ts

@@ -1,6 +1,16 @@
+/* svgs */
 declare module "*.svg" {
   import { ReactElement, SVGProps } from "react";
   const content: (props: SVGProps<SVGElement>) => ReactElement;
   export default content;
 }
+/* CSS modules */
 declare module "*.module.css";
+
+/* Vite env vars */
+interface ImportMetaEnv {
+  readonly VITE_API_URL: string;
+}
+interface ImportMeta {
+  readonly env: ImportMetaEnv;
+}