Bug: Configure git to install pre-commit

[machikoyasuda]

The bug

Running the postAttachCommand from devcontainer.json...

[127422 ms] Start: Run in container: /bin/bash .devcontainer/postAttach.sh
An error has occurred: FatalError: git failed. Is it installed, and are you in a Git repository directory?
Check the log at /home/compiler/.cache/pre-commit/pre-commit.log

What's next:
    Try Docker Debug for seamless, persistent debugging tools in any container or image → docker debug 82179c5c37d960b0829f5d823b5b13fbd4ee069c859faf6490dcc989ec89858b
    Learn more at https://docs.docker.com/go/debug-cli/
[127976 ms] postAttachCommand failed with exit code 1. Skipping any further user-provided commands.
Done. Press any key to close the terminal

The fix

Following cal-itp/benefits#2027 cal-itp/docker-python-web#36 cal-itp/benefits#2017, apply the same fix to configure git to install pre-commit cal-itp/eligibility-server#473