[gnome-software.wiki] Create How to reinstall a web app

[Phaedrus Leeds <mwleeds src gnome org>]

commit 30899854992d95af09f9f5937e046b1f062d8a77
Author: Phaedrus Leeds <mwleeds protonmail com>
Date:   Mon May 16 20:22:01 2022 +0000

    Create How to reinstall a web app

 How-to-reinstall-a-web-app.md | 11 +++++++++++
 1 file changed, 11 insertions(+)
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diff --git a/How-to-reinstall-a-web-app.md b/How-to-reinstall-a-web-app.md
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+GNOME Software supports managing two types of web apps:
+1. Web apps for which AppStream metainfo has been shipped with Software. See 
https://gitlab.gnome.org/mwleeds/gnome-pwa-list/-/blob/main/README.md
+2. Web apps which have been installed using [GNOME Web](https://apps.gnome.org/app/org.gnome.Epiphany/)
+
+The first type are displayed as available to install in Software (when this functionality has been enabled 
by the distribution), whereas the second type only show up in Software after they have been installed in Web. 
If you uninstall such an app and want to reinstall it, you must do so using GNOME Web. Here are the steps to 
follow to install a web app using GNOME Web:
+1. Navigate to the app's URL in Web, click the menu in the top right, and click on "Install Site as Web 
Application..."
+![Screenshot_from_2022-05-16_13-14-47](uploads/4d9b9925e6a4b051fcdad9d95f3a0b7e/Screenshot_from_2022-05-16_13-14-47.png)
+2. Click the "Create" button to install the web app:
+<img src="uploads/6abbc6bbd9f18d4f889efff8dc80ad7e/Screenshot_from_2022-05-16_13-16-21.png" width="366px" 
height="395px" alt="Dialog for creating a web application">
+
+The web app should now show up in Software's "Installed" tab.
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