Merge branch 'docs/complement-tech-articles' into 'master'

Complement tech articles guidelines

See merge request !11260

doc/articles/how_to_configure_ldap_gitlab_ce/index.md

 # How to configure LDAP with GitLab CE
 
-> **Type:** admin guide ||
+> **Article [Type](../../development/writing_documentation.html#types-of-technical-articles):** admin guide ||
 > **Level:** intermediary ||
 > **Author:** [Chris Wilson](https://gitlab.com/MrChrisW) ||
 > **Publication date:** 2017/05/03

doc/development/doc_styleguide.md

@@ -198,10 +198,17 @@ You can combine one or more of the following:
   the `.md` document that you're working on is located. Always prepend their
   names with the name of the document that they will be included in. For
   example, if there is a document called `twitter.md`, then a valid image name
-  could be `twitter_login_screen.png`.
+  could be `twitter_login_screen.png`. [**Exception**: images for
+  [articles](writing_documentation.md#technical-articles) should be
+  put in a directory called `img` underneath `/articles/article_title/img/`, therefore,
+  there's no need to prepend the document name to their filenames.]
 - Images should have a specific, non-generic name that will differentiate them.
 - Keep all file names in lower case.
 - Consider using PNG images instead of JPEG.
+- Compress all images with <https://tinypng.com/> or similar tool.
+- Compress gifs with <https://ezgif.com/optimize> or similar toll.
+- Images should be used (only when necessary) to _illustrate_ the description
+of a process, not to _replace_ it.
 
 Inside the document:
 

doc/development/writing_documentation.md

@@ -52,11 +52,13 @@ Every **Technical Article** contains, in the very beginning, a blockquote with t
 - A reference to the **type of article** (user guide, admin guide, tech overview, tutorial)
 - A reference to the **knowledge level** expected from the reader to be able to follow through (beginner, intermediate, advanced)
 - A reference to the **author's name** and **GitLab.com handle**
+- A reference of the **publication date**
 
 ```md
-> **Type:** tutorial ||
+> **Article [Type](../../development/writing_documentation.html#types-of-technical-articles):** tutorial ||
 > **Level:** intermediary ||
-> **Author:** [Name Surname](https://gitlab.com/username)
+> **Author:** [Name Surname](https://gitlab.com/username) ||
+> **Publication date:** AAAA/MM/DD
 ```
 
 #### Technical Articles - Writing Method

doc/user/project/pages/getting_started_part_four.md

 # GitLab Pages from A to Z: Part 4
 
-> **Type**: user guide || 
+> **Article [Type](../../../development/writing_documentation.html#types-of-technical-articles)**: user guide || 
 > **Level**: intermediate || 
-> **Author**: [Marcia Ramos](https://gitlab.com/marcia)
+> **Author**: [Marcia Ramos](https://gitlab.com/marcia) ||
+> **Publication date:** 2017/02/22
 
 - [Part 1: Static sites and GitLab Pages domains](getting_started_part_one.md)
 - [Part 2: Quick start guide - Setting up GitLab Pages](getting_started_part_two.md)

doc/user/project/pages/getting_started_part_one.md

 # GitLab Pages from A to Z: Part 1
 
-> **Type**: user guide || 
+> **Article [Type](../../../development/writing_documentation.html#types-of-technical-articles)**: user guide || 
 > **Level**: beginner || 
-> **Author**: [Marcia Ramos](https://gitlab.com/marcia)
+> **Author**: [Marcia Ramos](https://gitlab.com/marcia) ||
+> **Publication date:** 2017/02/22
 
 - **Part 1: Static sites and GitLab Pages domains**
 - [Part 2: Quick start guide - Setting up GitLab Pages](getting_started_part_two.md)

doc/user/project/pages/getting_started_part_three.md

 # GitLab Pages from A to Z: Part 3
 
-> **Type**: user guide || 
+> **Article [Type](../../../development/writing_documentation.html#types-of-technical-articles)**: user guide || 
 > **Level**: beginner || 
-> **Author**: [Marcia Ramos](https://gitlab.com/marcia)
+> **Author**: [Marcia Ramos](https://gitlab.com/marcia) ||
+> **Publication date:** 2017/02/22
 
 - [Part 1: Static sites and GitLab Pages domains](getting_started_part_one.md)
 - [Part 2: Quick start guide - Setting up GitLab Pages](getting_started_part_two.md)

doc/user/project/pages/getting_started_part_two.md

 # GitLab Pages from A to Z: Part 2
 
-> **Type**: user guide || 
+> **Article [Type](../../../development/writing_documentation.html#types-of-technical-articles)**: user guide || 
 > **Level**: beginner || 
-> **Author**: [Marcia Ramos](https://gitlab.com/marcia)
+> **Author**: [Marcia Ramos](https://gitlab.com/marcia) ||
+> **Publication date:** 2017/02/22
 
 - [Part 1: Static sites and GitLab Pages domains](getting_started_part_one.md)
 - **Part 2: Quick start guide - Setting up GitLab Pages**