Error in setting up webapp

Hi All , i am trying to setup webapp using github code from GitHub - mmumshad/simple-webapp: Simple Web Application and facing error in below step,Can any one help to resolve the same
:-Install and Configure Web Server
Install Python Flask dependency```
pip install flask
pip install flask-mysql


Error Message ,:- 

sarabjit@target3:~$ pip install flask
error: externally-managed-environment

× This environment is externally managed
╰─> To install Python packages system-wide, try apt install
    python3-xyz, where xyz is the package you are trying to
    install.

    If you wish to install a non-Debian-packaged Python package,
    create a virtual environment using python3 -m venv path/to/venv.
    Then use path/to/venv/bin/python and path/to/venv/bin/pip. Make
    sure you have python3-full installed.

    If you wish to install a non-Debian packaged Python application,
    it may be easiest to use pipx install xyz, which will manage a
    virtual environment for you. Make sure you have pipx installed.

    See /usr/share/doc/python3.12/README.venv for more information.

note: If you believe this is a mistake, please contact your Python installation or OS distribution provide                                                              r. You can override this, at the risk of breaking your Python installation or OS, by passing --break-syste                                                              m-packages.
hint: See PEP 668 for the detailed specification.

Hi, are you trying to work on this in one of the Ansible labs?
If so, please share the lab link — it will help us review the issue.

Regards.