Added dashboard page layout & sites overview

frontend/src/api/index.ts

@@ -0,0 +1,7 @@
+export const API_BASE_URL = '/api/v1';
+
+export const makeApiUrl = (endpoint: string) => {
+    const base = API_BASE_URL.endsWith('/') ? API_BASE_URL.slice(0, -1) : API_BASE_URL;
+    const path = endpoint.startsWith('/') ? endpoint : `/${endpoint}`;
+    return `${base}${path}`;
+};