fix: source certificates into Gatsby (#39648)

Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>
Co-authored-by: Shaun Hamilton <51722130+Sky020@users.noreply.github.com>

client/plugins/fcc-source-challenges/create-challenge-nodes.js

@@ -1,9 +1,11 @@
 const crypto = require('crypto');
 
 function createChallengeNode(challenge, reporter) {
+  // challengeType 11 is for video challenges (they only have instructions)
+  // challengeType 7 is for certificates (they only have tests)
   if (
     typeof challenge.description[0] !== 'string' &&
-    challenge.challengeType !== 11
+    (challenge.challengeType !== 11 && challenge.challengeType !== 7)
   ) {
     reporter.warn(`
 
@@ -17,7 +19,7 @@ function createChallengeNode(challenge, reporter) {
     .digest('hex');
   const internal = {
     contentDigest,
-    type: 'ChallengeNode'
+    type: challenge.challengeType === 7 ? 'CertificateNode' : 'ChallengeNode'
   };
 
   /* eslint-disable prefer-object-spread/prefer-object-spread */
@@ -26,13 +28,13 @@ function createChallengeNode(challenge, reporter) {
       Object.assign(
         {},
         {
-          id: challenge.id + ' >>>> ChallengeNode',
           children: [],
           parent: null,
           internal,
           sourceInstanceName: 'challenge'
         },
-        challenge
+        challenge,
+        { id: challenge.id + internal.type }
       )
     )
   );