feat(challenges): add backend challenge infrastructure (#11058)

* Feat: Initial backend view

* Feat: Refactor frame runner

* Feat: backend challenge submit runs tests

* Feat: Backend challenge request

* Feat: Whitelist hyperdev in csp

* Fix: Use app tests instead of challenge tests

* Feat: Allow hyperdev subdomains

* Fix(csp): allow hypderdev.space subdomains

* feat(challenge): submit backend

* feat: Add timeout to test runner (5 sec)

* chore(seed): Add more to test backend

* fix(csp): s/hyperdev/gomix/g

* fix(app): fix code mirror skeleton filepath

* fix(app): remove Gitter saga import

* fix(app): codemirrorskeleton does not need it's own folder
fix(app): cmk needs to work with Null types

* fix: No longer restart the browser when challenges change

* fix(app): Update jquery for challenges

* fix(seed): Remove to promise jquery call

* fix(lint): Undo merge error
undefined is no allowed

* fix(app): linting errors due to bad merge

* fix(seed): Remove old seed file

challenges/05-apis-and-microservices/api-and-microservice-projects.json

@@ -4,6 +4,29 @@
   "time": "150 hours",
   "helpRoom": "HelpBackend",
   "challenges": [
+    {
+      "id": "57ed709d334ad35e8fe79acb",
+      "title": "New Backend Format",
+      "isBeta": "true",
+      "meta": "This is just a test",
+      "description": [
+        "This is just a test of the new backend challenge test framework"
+      ],
+      "tests": [{
+        "text": "website should return 200",
+        "testString": "getUserInput => $.ajax({ url: getUserInput('url'), method: 'HEAD' }).then(null, (err) => assert.fail(err));"
+      }, {
+        "text": "package.json should have a valid \"keywords\" key",
+        "testString": "getUserInput => ($.get(getUserInput('url') + '/_api/package.json').then(function(data){ var packJson = JSON.parse(data); assert(packJson.keywords); }, err => { throw new Error('Err: ' + err.statusText);}))"
+      }, {
+        "text": "\"keywords\" field should be an Array",
+        "testString": "getUserInput => ($.get(getUserInput('url') + '/_api/package.json').then(function(data){ var packJson = JSON.parse(data); assert.isArray(packJson.keywords); }, err => { throw new Error('Err: ' + err.statusText);}))"
+      }, {
+        "text": "\"keywords\" should include \"freecodecamp\"",
+        "testString": "getUserInput => ($.get(getUserInput('url') + '/_api/package.json').then(function(data){ var packJson = JSON.parse(data); assert.include(packJson.keywords, 'freecodecamp'); }, err => { throw new Error('Err: ' + err.statusText); }))"
+      }],
+      "type": "backend"
+    },
     {
       "id": "bd7158d8c443edefaeb5bdef",
       "title": "Timestamp Microservice",