Update README.md

[benoit74]

With the migration to the new UI, many bits of README.md are now totally outdated:

• requirements to run the scraper are wrong, we should recommend to use the Docker image
• requirements and instructions to develop the scraper are wrong, we should probably redirect developers to CONTRIBUTING.md
• screenshots are outdated

Nothing critical or hard to fixed, but this needs to be done before 4.0 release

[VikramAditya33]

Which screenshots do you prefer? Currently there are 2 in README so we can have similar ones, one the home and second the LCC one. Which ones do you prefer

[benoit74]

I like the first screenshot (home in list view) ; I'm not convinced about which second one to choose. Maybe the last one with the home in thumbnails view but in light mode, to show that scraper supports both? And another screenshot of the home (or both?) on mobile phone sizes?

[VikramAditya33]

I like the first screenshot (home in list view) ; I'm not convinced about which second one to choose. Maybe the last one with the home in thumbnails view but in light mode, to show that scraper supports both? And another screenshot of the home (or both?) on mobile phone sizes?

Yes I also took some screenshots of mobile too

[benoit74]

Nice ! Do your best with all this, I don't have strong PoV besides I want the README to be mostly aligned and represent sufficiently the current UI.