added Testflight link to index

See merge request !30

Added QR-Code for Testflight

See merge request !29

Testflight link

See merge request !28

Update faq.md

See merge request !27

Add solution for fs read-only problem to english faq.md

See merge request !26

Update faq.md

See merge request !25

Add fix for read-only filesystem to german faq.md

See merge request !24

fix translation

See merge request !23

Update _index.md

See merge request !22

Update _index.md

See merge request card10/logix!21

workshops: move Rust workshop form events, also fix time

See merge request !20