Merge pull request #114 from datacamp/chore/update-readme

Update readme to add confluence article

Author: ztsorojev

README.md

@@ -1,5 +1,7 @@
 # RDocumentation 2.0
 
+_Note:_ Please read this [confluence page](https://datacamp.atlassian.net/wiki/spaces/PRODENG/pages/2314469377/RDocumentation) which explains the architecture of how RDocumentation works, and how to run the backend locally.
+
 RDocumentation provides an easy way to search the documentation for every version of every R package on [CRAN](https://cran.r-project.org/) and [Bioconductor](http://bioconductor.org/).
 
 ## Setup