Convert website into Shopify app -- 2

convert website to Shopify app to view store products in an alternative layout then the shops original to be in the shopify app store, shop owners can add/install my app for monthly fee create a login - have simple one page configuration admin panel embedded in shopify (i think they use iframe) admin page features.. select which or all collections to show in web app (collections are configured within main shopify admin) Hide out of stock products on/off ------------------ single page web app to be hosted on my server either [login to view URL] or [login to view URL] connects to shops and displays the categories (dropdown) and products images, price and pop up product description add product to cart (shopify cart) goto checkout - (sends back to shopify site) Save image Email image Social share image/product