docs: update README.md

fix: set pool_pre_ping to true (#16)

https://stackoverflow.com/questions/5631078/sqlalchemy-print-the-actual-query

Closes #15

fix: upgrade Flask to 2.0.3 (#10)

https://stackoverflow.com/a/71647006/8918153

fix(app): use monospace font (#9)

Default font was not monospace which causing
that some ASCII picture in comments was
not generated correctly. Using monospace
font should solve this issue.

feat: implement dark mode (#6)

fix: Enable multiline comments (#3)

If user submitted multiline comment it was generated as single line comment.

Closes #2

feat(app/views): Human readible date on entries

feat: Add files