Merge pull request #10 from spier/readme-improvements

[docs] Elaborating on the Usage instructions

Author: zkoppert

README.md

@@ -1,12 +1,18 @@
 # InnerSource Crawler
 ![.github/workflows/linter.yml](https://github.com/zkoppert/innersource-crawler/actions/workflows/linter.yml/badge.svg) ![Integration Test](https://github.com/zkoppert/innersource-crawler/actions/workflows/integration_tests.yml/badge.svg) ![CodeQL](https://github.com/zkoppert/innersource-crawler/actions/workflows/codeql-analysis.yml/badge.svg)
 
-This project creates a repos.json that can be utilized by the [SAP InnerSource Portal](https://github.com/sap/project-portal-for-InnerSource).
+This project creates a `repos.json` that can be utilized by the [SAP InnerSource Portal][SAP-InnerSource-Portal]. The current approach assumes that the repos that you want to show in the portal are available in a GitHub organization, and that they all are tagged with a certain _topic_.
 
 ## Installation
+
 `pip -r requirements.txt`
 
 ## Usage
-1. Fill out the .env file with a token from a machine user that only has access to the org to scan
-1. Fill out the .env file with the exact topic name you are searching for
-1. Run `python3 ./crawler.py`
+
+1. Copy `.env-example` to `.env`
+1. Fill out the `.env` file with a token from a machine user that only has access to the org to scan
+1. Fill out the `.env` file with the exact _topic_ name you are searching for
+1. Run `python3 ./crawler.py`, which will create a `repos.json` file containing the relevant metadata for the GitHub repos for the given _topic_
+1. Copy `repos.json` to your instance of the [SAP-InnerSource-Portal][SAP-InnerSource-Portal] and launch the portal as outlined in their installation instructions
+
+[SAP-InnerSource-Portal]: https://github.com/sap/project-portal-for-InnerSource