docs: 📝 update readme to include motivation

Author: dergecko

README.md

@@ -3,11 +3,24 @@
 # test-certs
 A simple tool to generate a root certificate authority (CA), intermediate, client, and server certificates for testing purposes.
 
-This tool is not intended for production use. Instead use tools like [`step-ca`](https://smallstep.com/docs/step-ca/) or similar.
+> This tool is not intended for production use. Please use a dedicated certificate infrastructure!
 
+## Motivation
+
+You want to have an easy and fast way to test TLS or even mTLS connections with x509 certificates but your infrastructure lags the processes or ways to get them?
+Or you have a testing environment that you deploy via ansible and want to create your on certificates to test TLS connections reliably?
+
+This project could be the answer then!
+
+Write your certificate chain configuration once and create all necessary certificates when ever you need new ones!
 
 ## Example
 
-An example on how to create an intermediate ca with a server and a client certificate.
+An example configuration file on how to create a root certificate that issues an intermediate ca which again issues a server and a client certificate.
+
+[Intermediate CA](./test-certs/tests/examples/intermediate_ca.yaml)
+
+## Other Tools
 
-[Intermediate CA](./test-certs/tests/examples/intermediate_ca.yaml)
+- [`step-ca`](https://smallstep.com/docs/step-ca/): A complete Public-Key-Infrastructure (PKI) that has a lot of features!
+- openssl: The good old way to create any certificate you need.