Preparing new 9.1.0 release.
Improved the search form.
get the search param filters
Simplified deployment section.
Fixed CSS menu class in article template.
Uses Bootstrap4 for the pagination component generated by Flask-Pagination.
Added SQLite configuration file.
added a way to specify a configuration file via an environment variable
fixed issues reported by flake8.
Added flake8 in dev requirements.
Added Debian build file for sourcehut builds.