Add maintaining.md (wulkano#291)

README.md

@@ -9,27 +9,15 @@
 
 **[Download the latest release](https://getkap.co/download)** (macOS only)
 
-Or install with [Homebrew Cask](https://caskroom.github.io):
+Or install with [Homebrew-Cask](https://caskroom.github.io):
 
 ```
-$ brew update
-$ brew cask install kap
+$ brew update && brew cask install kap
 ```
 
 ## Contribute
 
-1. [Fork](https://help.github.com/articles/fork-a-repo/) this repository to your own GitHub account and then [clone](https://help.github.com/articles/cloning-a-repository/) it to your local device
-2. Install the dependencies: `npm install`
-3. Build the code and watch for changes: `npm run dev`
-4. Run the app: `npm start`
-
-To make sure that your code works in the finished app, you can generate the binary:
-
-```
-$ npm run pack
-```
-
-After that, you'll see the binary in the `./dist` folder :smile:
+Read the [contribution guide](contributing.md).
 
 ## Dev builds
 

contributing.md

@@ -0,0 +1,14 @@
+# Contributing
+
+1. [Fork](https://help.github.com/articles/fork-a-repo/) this repository to your own GitHub account and then [clone](https://help.github.com/articles/cloning-a-repository/) it to your local device
+2. Install the dependencies: `npm install`
+3. Build the code and watch for changes: `npm run dev`
+4. In another terminal tab, run the app: `npm start`
+
+To make sure that your code works in the finished app, you can generate the binary:
+
+```
+$ npm run pack
+```
+
+After that, you'll see the binary in the `dist` folder 😀

maintaining.md

@@ -0,0 +1,7 @@
+# Maintaining
+
+## Developing Kap
+
+Run `npm run dev` in one terminal tab to start watch mode, and in another tab, run `npm start` to launch Kap.
+
+We strongly recommend installing an [XO editor plugin](https://github.com/sindresorhus/xo#editor-plugins) for JavaScript linting and a [Stylelint editor plugin](https://github.com/stylelint/stylelint/blob/master/docs/user-guide/complementary-tools.md#editor-plugins) for CSS linting. Both of these support auto-fix on save.