[Python] How do I run a server concurrently in GitHub Actions

I have configured the following workflow:

name: Python application

on:
push:
branches: [ "app" ]
pull_request:
branches: [ "app" ]

permissions:
contents: read

jobs:
build:

runs-on: ubuntu-latest

steps:
- uses: actions/checkout@v4
- name: Set up Python 3.10
uses: actions/setup-python@v3
with:
python-version: "3.10"
- name: Install dependencies
run: |
make install
- name: Lint with pylint
run: |
make lint
- name: Start Fastapi service
run: |
nohup make serve
- name: Test with pytest
run: |
make test


Here the Makefile for this is as follows:

install:
pip install -r requirements.txt

lint:
pylint --disable=R,C *.py

serve:
python app.py

test:
python -m pytest -vv test_app.py


The problem is, when I run the make serve command, the server starts and then goes on infinitely and never reaches the testing part. How do I configure my workflow such that the server runs in the backend and the testing starts? I have tried using nohup and it didn't work. What other things can I do?

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