Meta-description for pages/events/pois

[timobrembeck]

Motivation

To improve SEO, we want to add the possibility to add meta-descriptions for pages/events/pois.

Proposed Solution

• Add a new field meta_description = models.TextField(blank=True) to AbstractBasePageTranslation, EventTranslation and POITranslation models.
• Add this field to the PageTranslationForm, EventTranslationForm and POITranslationForm.
• Add a new textarea beneath the text/description fields to the templates of that form (page_form.html, event_form.html, poi_form.html).
• Add description property to the Region model, which can be used for the content overview in the app.

[svenseeberg]

The challenge here is that our content creators do not know anything about SEO. Therefore we need to steer them into a direction that in the end results in a good meta information. We could have an additional input field that asks for a 1 to 3 sentences summary of the page content.

The question is also if it impacts the search performance at all. The app team will investigate.

[steffenkleinle]

Once done please notify the app team (https://issues.tuerantuer.org/browse/IGAPP-296).