why can't i install requirements.txt in ubuntu [duplicate]

I used AWS EC2 to deploy the fastapi application to the server.And to run the server, I first ran pip install -r requirements.txt in the terminal, but an error occurred.I'm using MAC

ubuntu@ip-172-31-44-70:~/fastapi-castone$ pip install -r requirements.txt

I ran it like this

output

Collecting mysqlclient==2.2.4 (from -r requirements.txt (line 100))  Downloading mysqlclient-2.2.4.tar.gz (90 kB)━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 90.4/90.4 kB 10.5 MB/s eta 0:00:00  Installing build dependencies ... done  Getting requirements to build wheel ... error  error: subprocess-exited-with-error× Getting requirements to build wheel did not run successfully.│ exit code: 1╰─> [27 lines of output]      /bin/sh: 1: pkg-config: not found      /bin/sh: 1: pkg-config: not found      /bin/sh: 1: pkg-config: not found      Trying pkg-config --exists mysqlclient      Command 'pkg-config --exists mysqlclient' returned non-zero exit status 127.      Trying pkg-config --exists mariadb      Command 'pkg-config --exists mariadb' returned non-zero exit status 127.      Trying pkg-config --exists libmariadb      Command 'pkg-config --exists libmariadb' returned non-zero exit status 127.      Traceback (most recent call last):        File "/home/ubuntu/.local/lib/python3.10/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 353, in <module>          main()        File "/home/ubuntu/.local/lib/python3.10/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 335, in main          json_out['return_val'] = hook(**hook_input['kwargs'])        File "/home/ubuntu/.local/lib/python3.10/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 118, in get_requires_for_build_wheel          return hook(config_settings)        File "/tmp/pip-build-env-5qf5kyjk/overlay/local/lib/python3.10/dist-packages/setuptools/build_meta.py", line 325, in get_requires_for_build_wheel          return self._get_build_requires(config_settings, requirements=['wheel'])        File "/tmp/pip-build-env-5qf5kyjk/overlay/local/lib/python3.10/dist-packages/setuptools/build_meta.py", line 295, in _get_build_requires          self.run_setup()        File "/tmp/pip-build-env-5qf5kyjk/overlay/local/lib/python3.10/dist-packages/setuptools/build_meta.py", line 311, in run_setup          exec(code, locals())        File "<string>", line 155, in <module>        File "<string>", line 49, in get_config_posix        File "<string>", line 28, in find_package_name      Exception: Can not find valid pkg-config name.      Specify MYSQLCLIENT_CFLAGS and MYSQLCLIENT_LDFLAGS env vars manually      [end of output]  note: This error originates from a subprocess, and is likely not a problem with pip.error: subprocess-exited-with-error× Getting requirements to build wheel did not run successfully.│ exit code: 1╰─> See above for output.note: This error originates from a subprocess, and is likely not a problem with pip.

I am now following the video from this YouTube linkhttps://www.youtube.com/watch?v=SgSnz7kW-Ko