pip install mysqlclient error mysql_config not found linux

[ryumada]

I've found an error while installing the mysqlclient pip's package on my Linux machine. Here is what I've found to fix this: https://stackoverflow.com/questions/5178292/pip-install-mysql-python-fails-with-environmenterror-mysql-config-not-found

So in Ubuntu, we need to install a package called libmysqlclient-dev. After I installed it, the error was gone. Let's add it to the initial steps guide in the main README.md.

Also, there is some code snippet related to this problem:
https://www.codegrepper.com/code-examples/shell/install+mysqlclient+ubuntu+for+python+3.8