Update documentation for EFCore_WebApi example

[omelianlevkovych]

Description

Updated the documentation readme file for the example project.

Reasoning behind the change

While doing onboarding I have faced few obstacles.
It was considered that documentation update will be helpful. Therefore newcomers will not have to face same issues.

Additional changes

I have added table of content and fixed some typos.

[CLAassistant]

All committers have signed the CLA.

[omelianlevkovych]

Unfortunately, I haven't really used much github yet. In case I do need to link an issue somehow here, please, let me know.

Also I have a few additional questions.

• We do have docker-compose file in the example folder, however I failed to run it. What I am doing wrong, and what is the initial purpose of that file (we do have docker compose files in root folder already).
• In case it the docker compose file somehow can be used, can we add phpmyadmin as well. The GUI can be really helpful for folks who haven't used the MySQL a lot yet.
• We also have a build.sh file. Do we want powershell scrip as well for the Windows users. Is it even a forbidden question in the open source community 😆 ? I am not sure whether it is possible to run build.sh script on Windows OS.

[iancooper]

These look really helpful

[iancooper]

We do have docker-compose file in the example folder, however I failed to run it.
OK, I'll add it to my list of things to investigate, alongside the failing global inbox switch

In case it the docker compose file somehow can be used, can we add phpmyadmin as well.
Not used that before - so something for me to investigate (I tend to use DataGrip)

We also have a build.sh file. Do we want powershell scrip as well for the Windows users.
We can, I am just on a Mac so it would be hard to test. Some of the other maintainers are on Windows machines though. We don't have a preference as to the OS :-D

[preardon]

Looks, good to me, thanks for putting the effort in :)