updated docs

docs/sources/project/building_from_source.md

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+---
+page_title: Building from source
+page_description: Building from source Grafana.
+page_keywords: grafana, build, contribute, documentation
+---
+
+# Building from source
+
+If you have any idea for an improvement or found a bug do not hesitate to open an issue.
+And if you have time clone [the grafana repository](https://github.com/grafana/grafana) and submit a pull request and help me make Grafana
+the kickass metrics & devops dashboard we all dream about!
+
+Grafana uses nodejs and grunt as a build system for javascript, less compilation, and unit tests.
+
+## Get started
+
+ - Install nodejs.
+ - npm install -g grunt-cli
+ - npm install (in grafana repository root)
+
+### run development server
+
+ - grunt server
+
+### run less & jshint checks
+ - grunt
+
+### run unit tests
+ - grunt test
+
+### create optimized, minified build
+ - grunt build   (or grunt release to get zip/tar files)
+
+
+## Create a pull requests
+
+Before or after your create a pull requests, sign the [contributor license aggrement](/docs/contributing/cla.html).