Adding specific instructions for the web site

src/Instructions/NotesForWebSite.md

+# Notes for creating the GitHub web site
+
+This website will just contain the web files and any files needed by them. The repository from which these files are generated is [VTK Examples](https://gitlab.kitware.com/vtk/vtk-examples). You need to have cloned this site by default into a repository called `vtk-examples`.
+
+## Creating the site
+
+Create the site on GitHub, do not use the same name as the Kitware repository namely `vtk-examples`.
+Choose a name like `vtk-examples-web`. This means that when you clone the repository, you don't have to select a different name as the repository `vtk-examples` already exists.
+
+## Cloning
+
+Clone the site and you should have a folder `vtk-examples-web`. For convenience this should be in the same folder as your local [vtk-examples](https://gitlab.kitware.com/vtk/vtk-examples) repository.
+
+## After checkout
+
+Go to the `vtk-examples`, ensure that the file `mkdocs.yml`has the correct parameters.
+
+Then in the top-level folder of `vtk-examples`:
+
+``` bash
+./SyncSiteWithRepo REPO_URL REPO_DIR VTK_SOURCE_DIR
+```
+
+where:
+
+- `REPO_URL`: The URL of the repository where the web pages are.
+- `REPO_DIR`: The local directory of the web pages repository.
+- `REPO_URL`: The URL of the `vtk-examples` repository.
+
+## First commit
+
+Use `git add` to add the following folders:
+
+``` bash
+.gitignore
+LICENSE
+Tarballs/
+VTKColorSeriesPatches.html
+VTKNamedColorPatches.html
+site/
+src/
+```
+
+Then
+
+``` bash
+git commit -m "Updating the site"
+git push
+```
+
+It will take a while for the site to appear.
+
+## Subsequent commits
+
+In the top-level folder of `vtk-examples`:
+
+``` bash
+./SyncSiteWithRepo REPO_URL REPO_DIR VTK_SOURCE_DIR
+```
+
+Then after a while:
+
+``` bash
+git status
+git commit -a -m"Updating files"
+git push
+```
+
+If there are new files:
+
+``` bash
+git status
+git add <The files>
+git commit -m"Adding new files"
+git push
+```