There is great feature in Microsoft Edge where you could install website as application, you could try it by going to ...->Apps->Install this site as an app. You practically could do this for all websites and it will work. However, you could make this website ready for it, by implementing its feature like Jump List or any other functionality where makes user experience better like having some offline browsing experience too.
It would be nice to work directly with Microsoft Edge team to make Microsoft Tech Community ready for that and it could be two direction collaboration where you could share feedback to make this feature better.
