init: Create README.md

README.md

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+# gh-pages
+
+### WHERE did these files come from?
+These files come from the build results of the flutter web application project into several files that can be executed by the website. 
+
+<br>
+
+## Steps 
+Here is how to generate the following files
+- Go to the flutter_web_app project directory ```cd flutter_web_app```
+- Run the ```flutter build web``` command _(more details in the [Flutter Docs - Web Build](https://docs.flutter.dev/platform-integration/web/building#build))_
+- This will create a new folder ```build/web/``` and it's content
+- Then finally all the contents of the ```build/web``` folder will be placed in this ```gh-pages``` branch