added signup v3 endpoints and developed initial new signup flow

backend/src/routes/v3/index.ts

@@ -1,9 +1,11 @@
 import auth from './auth';
 import secrets from './secrets';
 import workspaces from './workspaces';
+import signup from './signup';
 
 export {
     auth,
     secrets,
-    workspaces
+    signup,
+    workspaces,
 }