Update doc_writing_guide.md

Co-Authored-By: Allan Nordhøy <epost@anotheragency.no>

doc_writing_guide.md

@@ -1 +1,37 @@
-# Guide to writing documentation
+# Guide to writing application documentation
+
+## Pages for user / administative documentation
+
+Add a one-click installation button (like for example: https://yunohost.org/#/app_piwigo)
+
+Classification of the application can be done using the available tags (genre, Git, management association, e-mails, etc.)
+
+*/Find a suitable documentation license. Permissive or not? (CC BY_SA)/*
+
+## Clarify the types of uses it has (special and general application (editorial choice)
+
+ + For links to other languages, add (en)` for Egnlish, and so on.
+
+### Things to include in application documentation
+
+ 1. An index of what is included, without reiterating the full content of what is to be found in subsequent chapters.
+ 1. A one-click install button.
+ 1. A general presentation of the application and its function.
+ 1. A section detailing administration of the application.
+ 1. A further section on changes specific to YunoHost.
+ 1. A section about the desktop client (if applicable). Links to different third party applications (if they exist), (or a link to a list of applications [framalibre.org](https://framalibre.org)) or a link to a page that has to do with the different official applications (if applicable).
+ + A further section:
+    - Links to the official website.
+    - Links to the package in YunoHost.
+ 1. Documentation of any further uses (documentation of an application).
+
+## Roadmap
+
+1. Documentation of the applications.
+   1. Document how the application operates in use (marked: work) level 8/7/6.
+   1. Translate the documentation at-least into French and English.
+   1. Send a PR to the repository of the app that details its documentation.
+
+## Document an application
+
+Do you need to detail how it works?