Add information on Netlify

Author: graeme-a-stewart

howto-website.md

@@ -26,6 +26,8 @@ If you wish (and it is recommended) you can easily set up a local instance of th
 on installing and running Jekyll.
 The website uses the main branch of the [hsf.github.io](https://github.com/HSF/hsf.github.io) repository.
 
+When you make a pull request to the website repository, Netlify will build a preview version of the website with your PR. This will allow you to double check the update looks the way that you intended (check for the `Deploy Preview` URL in the PR; it will be something like `https://deploy-preview-1644--earnest-hotteok-b1e1bf.netlify.app/`).
+
 If you are not familiar with GitHub and Git, you can read our [survival kit]({{ site.baseurl }}/github-beginners.html)!
 
 ### General structure of website content files
@@ -43,7 +45,7 @@ In the *front-matter* (but not in the text itself), you need to replace any `&`
 The recommended way to host a collaborative note book, e.g. for taking meeting minutes (live notes),
 is to use a collaborative editing tool utilising Markdown directly.  This makes it trivial to move the content into the HSF website for archiving.
 
-[CodiMD](https://hackmd.io/c/codimd-documentation/%2Fs%2Fcodimd-documentation) is the suggested choice as it has been designed for collaboraitve editing of Markdown files. Unfortunately, the [Hackmd](https://hackmd.io) free service is now restricted to 4 editors. Another possibility, if you have a CERN account, is to use CERNBox which makes CodiMD available to edit Markdown files: you can then define a public link to the document (similar to Google Docs public links) to allow those without a CERN account to edit the file.
+If you have a CERN account, is to use CERNBox which makes CodiMD available to edit Markdown files: you can then define a public link to the document (similar to Google Docs public links) to allow those without a CERN account to edit the file. Similarly, the Helmholtz Association has a web based markdown instance that can be used at <https://notes.desy.de>.
 
 We find that *recycling* the same document for a series of meetings is extremely useful
 as the *live notes* link can be copied and cloned from one meeting to the next.
@@ -54,7 +56,6 @@ Google Docs can also be used for shared notebooks, but in this case there is a n
 the document to Markdown before it can be added to the website. This is less convenient, but
 we have [documentation]({{ site.baseurl }}/jekyll-beginners.html) on how to do it.
 
-
 ### Adding coordination meeting minutes
 
 HSF Coordination minutes are produced using the live notes approach described above. The content of the live notes are preformatted to be suitable for direct injection into Jekyll, after minimal edits described in the [running-meetings]({{ site.baseurl }}/organization/running-meetings.html) page. The minutes file must be placed into Jekyll `organization/_posts` directory.