Make the CoC a top-level page (#177)

Author: odow

_config.yml

@@ -113,18 +113,20 @@ navigation_header:
   url: /
 - title: Documentation
   url: https://jump.dev/JuMP.jl/stable/
-- title: Learn
-  url: /pages/learn/
 - title: Community
   items:
-  - title: Calendar
-    url: /pages/calendar
-  - title: Forum
+  - title: Get help
     url: /forum
-  - title: Chatroom
+  - title: Developer chatroom
     url: /chatroom
-  - title: Ecosystem
+  - title: Calendar
+    url: /pages/calendar
+  - title: Ecosystem overview
     url: /pages/code/
+  - title: Learn more
+    url: /pages/learn/
+  - title: Code of Conduct
+    url: code-of-conduct
 - title: Workshops
   items:
    - title: 2025

chatroom.md

@@ -5,5 +5,13 @@ title:  "Developer chatroom"
 JuMP uses the `#jump-dev` channel of the Julia community slack to discuss
 developer-related aspects of JuMP.
 
+Use the chatroom to chat about package development related to JuMP. Perhaps you
+want guidance developing a new solver interface to JuMP, or you have a specific
+question about why some source code is the way it is. Prefer to ask more general
+usage questions on our [community forum](/forum).
+
 Join the Julia community slack by following the link and instructions at
 [https://julialang.org/slack/](https://julialang.org/slack/).
+
+By using the chatroom, you agree to uphold the standards of our community as
+described in the [Code of Conduct](/code-of-conduct).

code-of-conduct.md

@@ -0,0 +1,10 @@
+---
+title:  "Code of Conduct"
+---
+
+The JuMP community strongly values inclusivity and diversity. Everyone should
+treat others with the utmost respect. Everyone in the community must adhere to
+the [NumFOCUS Code of Conduct](https://numfocus.org/code-of-conduct) and the
+[Julia Community Standards](https://julialang.org/community/standards/), which
+reflect the values of our community. Both these links have information on how to
+confidentially report a violation.

forum.html

@@ -0,0 +1,18 @@
+---
+title:  "Community forum"
+---
+
+JuMP uses the "Optimization (Mathematical)" section of the
+[Julia community Discourse]((https://discourse.julialang.org/c/domain/opt/13))
+as our community forum.
+
+Use the forum to ask usage questions related to JuMP, or to search for past
+questions and answers. There is no such thing as a bad question, and this isn't
+StackOverflow where you need to have a neatly framed question with a single
+answer. If you look at past questions, you'll see that there are many
+back-and-forth discussions!
+
+Join the forum at: [https://discourse.julialang.org/c/domain/opt/13](https://discourse.julialang.org/c/domain/opt/13).
+
+By using the forum, you agree to uphold the standards of our community as
+described in the [Code of Conduct](/code-of-conduct).

forum.md

@@ -7,12 +7,6 @@ This page collates upcoming events related to JuMP.
 ## Regularly scheduled calls
 
  * There is a monthly JuMP developers call on the fourth Thursday of each month
-   at 14:00 Eastern time. The call is open to all community members. For a
+   at 14:30 Eastern time. The call is open to all community members. For a
    calendar invite and access to the Zoom link, join the [developer chatroom](/chatroom)
    and ask `@odow` for an invite.
-
-## JuMP at conferences
-
- * Miles Lubin and Benoît Legat will host a workshop on JuMP at the
-   [2022 ICCOPT summer school](https://iccopt2022.lehigh.edu/summer-school/summer-school-program/),
-   to be held July 24, 2022.

pages/calendar.md

@@ -14,12 +14,7 @@ for mathematical optimization based on the JuMP modeling language.
 
 ## Code of Conduct
 
-The JuMP community strongly values inclusivity and diversity. Everyone should
-treat others with the utmost respect. Everyone in the community must adhere to
-the [NumFOCUS Code of Conduct](https://numfocus.org/code-of-conduct) and the
-[Julia Community Standards](https://julialang.org/community/standards/), which
-reflect the values of our community. Both these links have information on how to
-confidentially report a violation.
+See [Code of Conduct](/code-of-conduct).
 
 ## Entities