Add: backend dir and moved frontend to frontend dir

frontend/public/config/settings.dev.json

@@ -0,0 +1,11 @@
+{
+  "apiConfig": {
+    "baseUrl": "http://localhost:3000",
+    "endpoints": {
+      "auth": {
+        "login": "/auth/login",
+        "validateToken": "/auth/validate-token"
+      }
+    }
+  }
+}

frontend/public/config/settings.prod.json

@@ -0,0 +1,11 @@
+{
+  "apiConfig": {
+    "baseUrl": "http://localhost:3000",
+    "endpoints": {
+      "auth": {
+        "login": "/auth/login",
+        "validateToken": "/auth/validate-token"
+      }
+    }
+  }
+}