feature request: Title overview for Instagram

[FelixArt]

Weekly overview Posts in our Instagram stories were requested by visitors.

• They should exclude the event description.
• should look nice
• converted to JPG for upload to IG

[dominikgeissler]

can you provide a basic image template (e.g. the background with a common title or something similar)?

[FelixArt]

I have added Background and an example to the insta branch of the repo