docs: add basic documentation

Author: RafLeszczynski

README.md

@@ -1,2 +1,30 @@
 # sass-lint-config-airhelp
-AirHelp SASSLint shareable config
+npm package with AirHelp SASSLint shareable config
+##Usage
+1. Install `sass-lint`
+```
+  npm install --save-dev sass-lint
+```
+2. Create `.sass-lint.yml` in root directory same as `package.json`
+3. Add path AirHelp SASSLint shareable config to to the `.sass-lint.yml` file 
+```yml
+options:
+  config-file: node_modules/sass-lint-config-airhelp/.sass-lint.yml
+```
+##Contribution
+Please introduce changes in separate PRs.
+
+This package is using [simple-git-changelog](https://github.com/ianhenderson/simple-git-changelog) for creating changelog. Please use following prefixes for all commits that are supposed to be part of changelog:
+* `changelog`
+* `fix`
+* `docs`
+* `chore`
+* `feat`
+* `feature`
+* `refactor`
+* `update`
+
+for example:
+```
+git commit -m "fix: lorem ispum dolor"
+```