Add CONTRIBUTING.md and guidelines (#91)

* Add CONTRIBUTING.md

* Update README.md with CONTRIBUTING.md

* Minor improvemnts to contrinbuting.md

CONTRIBUTING.md

@@ -0,0 +1,35 @@
+# Contributing
+
+## Contribute
+To contribute to the website with **new features, improvements or UX/UI changes** feel free to open an [Issue](https://github.com/iScsc/blog.iscsc.fr/issues/new).  
+You can **fix bugs or typos** by submiting a [Pull Request](https://github.com/iScsc/blog.iscsc.fr/pulls).
+
+To **add or update content** gathered on this website give a look at our [tutorial](https://iscsc.fr/posts/publish-your-own-post/) for new contributors 🙂  
+...or directly open a [Pull Request](https://github.com/iScsc/blog.iscsc.fr/pulls) if you already know how these things work 😉
+
+Content is placed under [`./src/content`](https://github.com/iScsc/blog.iscsc.fr/tree/main/src/content).
+
+## Guidelines
+When contributing to the website's content, please try to follow the following guidelines.
+
+Tags:
+- **Use already existing tags** (mind tags proliferation)
+- Use **singular** instead of plural --> TO FIX
+- Most of the time use **2 to 5 tags**
+- **No upper case** except for acronyms and FR
+- [Non-English]\: Add an upper case tag for the language, for example `FR` for French
+
+Title:
+- Title should be **straight to the point and explicit**
+- [Non-English]\: Add an [emoji](https://gohugo.io/quick-reference/emojis/#country-flag) flag for the language at the end
+- [Write-Ups]\: End title with `Write-Up <CTF> <YEAR>`
+
+Files:
+- Use **lower-case, dash-separated names**
+- Filenames will become URLs, they should be **explicit, relatively short and close to article's title**
+- In case you have images: create a folder, place your article inside and name it `index.md`, an [example](https://github.com/iScsc/blog.iscsc.fr/tree/main/src/content/posts/publish-your-own-post)  
+  *NOTE: called [leaf bundle](https://gohugo.io/content-management/page-bundles/#leaf-bundles) by HUGO*
+- [Write-Ups]\: Name the file `name-of-challenge-wu-<category>.md` (the category is optional)
+
+Other:
+- check emojis on https://gohugo.io/quick-reference/emojis/

README.md

@@ -162,7 +162,12 @@ Incoming features:
 
 ## Contributing
 
-To contribute to the website **code or good-looking** feel free to open an [Issue](https://github.com/iScsc/blog.iscsc.fr/issues/new) for new features, improvements or UX/UI changes, or directly a [Pull Request](https://github.com/iScsc/blog.iscsc.fr/pulls) for bug fixes or typos.
+*See [CONTRIBUTING.md](./CONTRIBUTING.md) for a complete guide to contributing and guidelines.*
 
-To contribute to the **knowledge** gathered on this website give a look at our [tutorial](https://iscsc.fr/posts/publish-your-own-post/) for new contributors 🙂  
-...or directly open a [Pull Request](https://github.com/iScsc/blog.iscsc.fr/pulls) if you already know how these things work 😉
+To contribute to the website with **new features, improvements or UX/UI changes** feel free to open an [Issue](https://github.com/iScsc/blog.iscsc.fr/issues/new).  
+You can **fix bugs or typos** by submiting a [Pull Request](https://github.com/iScsc/blog.iscsc.fr/pulls).
+
+To **add or update content** gathered on this website give a look at our [tutorial](https://iscsc.fr/posts/publish-your-own-post/) for new contributors 🙂  
+...or directly open a [Pull Request](https://github.com/iScsc/blog.iscsc.fr/pulls) if you already know how these things work 😉
+
+Content is placed under [`./src/content`](https://github.com/iScsc/blog.iscsc.fr/tree/main/src/content).