Added models include option in docker build

Fix Docker build failing due to username casing

Improve container publishing workflow

Set jinja2 version

Upgrade to flask 2

include language detected, confidence for /translate calls with auto detect

Fix broken link on README

Edit README documentation

Mostly minor changes in phrasing

Improve links in mobile app documentation

Add the PussTheCat.org instance

Fix language detection error

The root cause was load_installed_languages() of argostranslate
being called at the top of the file instead of inside a function,
this caused the list of installed languages to incorrectly be
returned as an empty list.

suggestions: Abort when missing parameters

app: Fail when giving invalid API keys

- Remove unnecessary import
- Reorder imports
- Fix whitespace issues

When an API key is passed, fail in the case of an invalid API key even
if an API key is not required. This allows the user to know that the API
key is invalid. Otherwise, they work under the assumption that the API
key is correct, even though it is not.