docs: include project-specific information in README.md

README.md

 # covid-19-dashboard
 
-This is a Renku project - basically a git repository with some
-bells and whistles. You'll find we have already created some
-useful things like `data` and `notebooks` directories and
-a `Dockerfile`.
+A Renku project for exploring Covid-19 data sources.
 
-## Working with the project
+# Data Sources
 
-The simplest way to start your project is right from the Renku
-platform - just click on the `Environments` tab and start a new session.
-This will start an interactive environment right in your browser.
+## Covid-19
 
-To work with the project anywhere outside the Renku platform,
-click the `Settings` tab where you will find the
-git repo URLs - use `git` to clone the project on whichever machine you want.
+- https://github.com/CSSEGISandData/COVID-19
+- https://github.com/COVID19Tracking/covid-19-crawler
+- https://github.com/openZH/covid_19
 
-### Changing interactive environment dependencies
+## General
 
-Initially we install a very minimal set of packages to keep the images small.
-However, you can add python and conda packages in `requirements.txt` and
-`environment.yml` to your heart's content. If you need more fine-grained
-control over your environment, please see [the documentation](https://renku.readthedocs.io/en/latest/user/advanced_interfaces.html#dockerfile-modifications).
-
-## Project configuration
-
-Project options can be found in `.renku/renku.ini`. In this
-project there is currently only one option, which specifies
-the default type of environment to open, in this case `/lab` for
-JupyterLab. You may also choose `/tree` to get to the "classic" Jupyter
-interface.
-
-## Moving forward
-
-Once you feel at home with your project, we recommend that you replace
-this README file with your own project documentation! Happy data wrangling!
+- https://data.worldbank.org/indicator/SP.POP.TOTL