deploy fast api server

[yishain11]

🧱 blocked by: #8 #7 DOD:

• [x] using render, deploy fastapi repo - dev branch. this will be our dev server env.
• [x] go over the deployment logs and make sure that it works. fix any erros you find.
• [x] save url inside a env variable
• [x] specify the env var name and its usage inside your readme file
• [x] test that the deployment works with curl
• [x] add unit test that send a req to the server location to make sure that it works.

[MohamadShaheen]

FastAPI Server