fix: make github url optional for backend projects (#37936)

api-server/server/boot/challenge.js

@@ -261,11 +261,7 @@ function projectCompleted(req, res, next) {
   ]);
   completedChallenge.completedDate = Date.now();
 
-  if (
-    !completedChallenge.solution ||
-    // only basejumps require github links
-    (completedChallenge.challengeType === 4 && !completedChallenge.githubLink)
-  ) {
+  if (!completedChallenge.solution) {
     return res.status(403).json({
       type: 'error',
       message:

client/src/templates/Challenges/projects/ProjectForm.js

@@ -18,7 +18,7 @@ const options = {
     solution: 'url',
     githubLink: 'url'
   },
-  required: ['solution', 'githubLink']
+  required: ['solution']
 };
 
 export class ProjectForm extends Component {