Preparing new 9.1.0 release.

Improved the search form.

Improved login form.

get the search param filters

Simplified deployment section.

Updated README.

Updated README.

Updated README.

Updated README.

Fixed CSS menu class in article template.

Uses Bootstrap4 for the pagination component generated by Flask-Pagination.

fixed some JavaScript to like/unlike an article from the home page.

removed unused imports

cleaned imports

removed unused variable

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.

Updated README.