I need a A PWA BUTTON from my web

I have a web page that does not care about aesthetics, but it has a file that is [login to view URL] and within that file there are defined some values ​​such as the name of the page, the name of the client and where the logo is located. Now on that web page I am going to make a subfolder called /android You will see that /android has an aesthetic similar to the Google Play Store and a green button. That green button will install a PWA from the root website / (not /android), the green button will be the one who will install the PWA, but in the data, such as the name of the application, logo address and other issues, it will to be in the [login to view URL] file which is in the root. --if you read my post and can do the job, pm with the word chungo, other PM will be ignored-- In other words, once the work is finished, if I upload that /android folder that you are going to prepare to any website, as long as it has [login to view URL] in the root, it will allow the PWA to be installed with the logo, the name, which PHP variables gives me, so that way, for example,