Automatically ignore changes to the config file upon install

Author: drew-gross

CONTRIBUTING.md

@@ -3,11 +3,11 @@ We want to make contributing to this project as easy and transparent as
 possible.
 
 ## Our Development Process
-The standard installation method also clones the git repository, so you can start making and submitting changes right away. For convenience, you can use `git update-index --assume-unchanged Parse-Dashboard/parse-dashboard-config.json` to ignore your own personal configuration.
+The standard installation method also clones the git repository, so you can start making and submitting changes right away.
 
-When working on the dashboard, use `npm run dashboard` and visit `localhost:4040` to see your dashboard.
+When working on the dashboard, use `npm run dashboard` and visit `localhost:4040` to see your dashboard. The `npm` script will automatically re-build your files when you change them, so after making a change, all you need to do is refresh the page.
 
-When working on components, use `npm run pig` and visit `localhost:4041` to view our component library and documentation (you can have both running at once). The demos for each component are the primary way we test components, although there are also a small number of automated tests you can run with `npm test`.
+When working on React components, use `npm run pig` and visit `localhost:4041` to view our component library and documentation (you can have both running at once). The demos for each component are the primary way we test components, although there are also a small number of automated tests you can run with `npm test`.
 
 ## Pull Requests
 We actively welcome your pull requests.

package.json

@@ -38,7 +38,8 @@
     "pig": "http-server ./PIG -p 4041 -s & webpack --config PIG.config.js --progress --watch",
     "build": "NODE_ENV=production webpack --config production.config.js && webpack --config PIG.config.js",
     "test": "NODE_PATH=./node_modules jest",
-    "generate": "node scripts/generate.js"
+    "generate": "node scripts/generate.js",
+    "preinstall": "git update-index --skip-worktree Parse-Dashboard/parse-dashboard-config.json"
   },
   "jest": {
     "testPathDirs": [