The FastAPI server needs to be started. Run:
cd /home/everyesp/public_html ./start_server.sh
Or manually:
cd /home/everyesp/public_html nohup uvicorn app.main:app --host 127.0.0.1 --port 8000 > server.log 2>&1 &
Then check: curl http://127.0.0.1:8000/