[BUG] Accessible git directory

[Stopka]

Bug
The docker image contains and exposes the .git directory. It's generally considered a security flaw to expose it or even have it in the container image.
There is also accessible a .editorconfig

How to replicate

1. Run the image using the official manual https://ttrss.henry.wang/#deployment-via-docker
2. Try to request any file from git folder like http://localhost:80/.git/config

Expected behavior
Response with 404 http status

Actual behavior
Browser downloads file from .git directory.

Proposed fix
Add .git direcotry and .editorconfig file to .dockerignore file to be omitted from the container image build.

Affected version
Tested on current wangqiru/ttrss:latest (containing Tiny Tiny RSS v23.12-d4ae6c6)

[Stopka]

Thank you 🙏

[Joselo2022]

Kk