allow downloading of branches from npm script

Author: bradwestfall

README.md

@@ -23,7 +23,7 @@ To view the code for a given lesson, _checkout_ the appropriate branch name. The
 
 ### Installing lesson branches
 
-All the branches are checked out to your local machine automatically when you do `npm install`. Just do a `git branch` to verify and see all branches after.
+All the branches are checked out to your local machine automatically when you do `npm install`. Just do a `git branch` to verify and see all branches after. If they didn't appear, try running `npm run branches` to download all the branches.
 
 To view a branch: `git checkout [branch-name]`
 

package.json

@@ -6,7 +6,8 @@
   "scripts": {
     "start": "webpack-dev-server --mode development --config config/webpack.config.dev.js",
     "build": "webpack --mode production --config config/webpack.config.production.js",
-    "postinstall": "sh getbranches.sh"
+    "branches": "sh getbranches.sh",
+    "postinstall": "npm run branches"
   },
   "devDependencies": {
     "@babel/core": "^7.2.2",