fix: add regSource when signup up through challenge Register btn

Author: rakibansary

.circleci/config.yml

@@ -343,7 +343,7 @@ workflows:
             branches:
               only:
                 - develop
-                - fix/settings-save-fail
+                - fix/regsource
       # This is alternate dev env for parallel testing
       - "build-test":
           context : org-global      

src/shared/containers/challenge-detail/index.jsx

@@ -297,7 +297,7 @@ class ChallengeDetailPageContainer extends React.Component {
     } = this.props;
     if (!auth.tokenV3) {
       const utmSource = communityId || 'community-app-main';
-      window.location.href = `${config.URL.AUTH}/member?retUrl=${encodeURIComponent(window.location.href)}&utm_source=${utmSource}`;
+      window.location.href = `${config.URL.AUTH}/member?retUrl=${encodeURIComponent(window.location.href)}&utm_source=${utmSource}&regSource=challenges`;
     } else if (_.every(terms, 'agreed')) {
       registerForChallenge(auth, challengeId);
     } else {