Api for practice

In this project I am using for practice using Api Rest and good patters in PHP outside of Laravel or others frameworks.
I need improve mi tecnicles of development :

• Practice OOP
• DTO
• Testing ( PhpUnit )
• Composer
• Docker

I think "I need a project I practice all this concepts".

Practice

• DTO (Data transfer objects)
• Practice get data from Api Rest
• Create database for store data

Sources

I am using this free api rest a lot of interesting :

• https://api.nasa.gov
• https://ssd-api.jpl.nasa.gov/doc/periodic_orbits.html