build: add section "how to creating local development environment" (K…

…eycapsss#115)

README.md

@@ -20,6 +20,24 @@ Please use this [commit message conventions](https://www.conventionalcommits.org
 The project uses [Gridsome](https://gridsome.org) as a Static Site Generator.
 [![Netlify Status](https://api.netlify.com/api/v1/badges/06821f1d-3e33-4bd4-92b2-4e44f3583060/deploy-status)](https://app.netlify.com/sites/keebfolio/deploys)
 
+#### Creating local development environment
+
+##### Creating Github Auth Token
+
+1. Go to `https://github.com/settings/tokens`
+2. Click "Generate new token"
+3. Set note and expiration, then click "Generate token"
+4. Copy generated token, you will need it in another step
+
+##### Installation and running local version
+
+1. Create environment variables:
+   - `GITHUB_AUTH_TOKEN` with generated token as its value.
+   - `GITHUB_API_V4_URL` with value `https://api.github.com/graphql`
+2. Clone repository
+3. `npm install`
+5. `npm run develop`
+
 ### License
 
 [![CC4](https://mirrors.creativecommons.org/presskit/buttons/88x31/svg/by-nc-sa.svg)](http://creativecommons.org/licenses/by-nc-sa/4.0/)