Make README more user friendly, and less dependent on domain knowledge

[kevin-kline]

Here is a suggestion for substitution our current "User Setup" section:

User Setup

NOTE: If you only plan to run the product, this is the only section you should need

1. Clone this repository
   

   git clone https://github.com/merico-dev/lake.git
   cd lake

2. Create a copy of the sample configuration files with

   cp config/docker.sample.js config/docker.js
   cp config/plugins.sample.js config/plugins.js
   

3. Get tokens for the data sources you want to pull from

Data Sources we Currently Support:

....insert data source chart....

For example, if you want to get an API token from GitLab, follow these directions:

gitlab

4. Open your favourite IDE to start editing files

5. Find the plugin config file that we just created (config/plugins.js)

6. Replace the "token" fields with the tokens you created in step 3

NOTE: For more info on plugin configuration, please see: data-source

4. Start the service with npm start

   you can stop all docker containers with npm run stop

5. Run docker-compose logs -f lake to check the logs and see when lake stops collecting your data. This can take up to 20 minutes for large projects. (gitlab 10k+ commits or jira 5k+ issues)

6. Navigate to Grafana Dashboard https://localhost:3002 (Username: admin, password: admin)

[kevin-kline]

This is needed unless we change to a programmatic configuration prompt system:

#212

[joncodo]

We ended up doing programatic configuration with npm run configure. Since we are doing this, this ticket is no longer needed. Feel free to re-open it. :)