In general, if you would like to create an app, it’s easier to start from scratch
or from the Playground’s code. Playground is simpler than EO Browser and thus has less code.
The general idea is to utilize the Sentinel Hub APIs for getting the data and to have a dedicated configuration with the collections that are available in the app.
Sentinel Hub APIs:
- Processing API for getting images
- Catalog API for getting metadata such as acquisition dates etc
- Statistical API for statistics
A good location for the “configuration” - which collections (S2 L2A, S2 L1C, S1 GRD, …) and visualizations for them are available in the app - is in the app or a separate source and the best format is probably JSON.
You can also use the instances that you create in the Dashboard (mentioned in the previous reply), but you would need to have the ids / URLs listed and then request the data from the Sentinel Hub (documentation).