feat(challenge-redirect): Make '/challenge' and '/map' redirect to learn (#17144)

* feat(challenge-redirect): Make '/challenge' and '/map' redirect to learn

* fix(linting): Generate pathMigrationMap on 'prelint-js'

* fix(script): fix "only once" script

* fix(lock): Fix lock file

createPathMigrationMap.js

@@ -0,0 +1,60 @@
+require('babel-register');
+
+const fs = require('fs');
+const path = require('path');
+const { Observable } = require('rx');
+const getChallenges = require('./getChallenges');
+const { dasherize } = require('../server/utils');
+
+let pathMap = {};
+
+function createPathMigrationMap() {
+  return new Promise(resolve => {
+  Observable.of(getChallenges())
+.map(blocks => {
+  blocks.forEach(block => {
+    const {name: blockName, superBlock, challenges } = block;
+    if (!(dasherize(superBlock) in pathMap)) {
+      pathMap[dasherize(superBlock)] = {};
+    }
+    if (!(dasherize(blockName) in pathMap[superBlock])) {
+      pathMap[dasherize(superBlock)][dasherize(blockName)] = challenges
+        .map(({ title, challengeType }) => ({
+          dashedName: dasherize(title),
+          challengeType
+        }));
+    }
+  });
+})
+  .subscribe(() => {}, console.error, () => {
+    const migMap = Object.keys(pathMap)
+      .filter(key => !key.includes('certificate'))
+      .map(superBlock => {
+        return Object.keys(pathMap[superBlock])
+        .map(block => {
+          return pathMap[superBlock][block]
+            .reduce((map, {dashedName, challengeType}) => ({
+              ...map,
+              [dashedName]: challengeType === 7 ?
+                `/${superBlock}/${block}` :
+                `/${superBlock}/${block}/${dashedName}`
+            }), {});
+          }).reduce((acc, current) => ({
+            ...acc,
+            ...current
+          }), {});
+        }).reduce((acc, current) => ({
+          ...acc,
+          ...current
+        }), {});
+      fs.writeFileSync(
+        path.resolve(__dirname, '../server/resources/pathMigration.json'),
+        JSON.stringify(migMap, null, 2)
+      );
+      resolve();
+    });
+  });
+}
+
+
+  exports.createPathMigrationMap = createPathMigrationMap;