Docs modifications (#5804)

- Fixes #5504
- Fixes #5503
- Return 404 when the page does not exist
- Modified the footer in order to align it properly
- Removed "noticed something to change" in each table of content
- Fixed the URLs of the edit module 
- Added the edit module to Developers
- Fixed header style on the REST API page.
- Edited the README to point to Developers
- Fixed selected state when clicking on sidebar elements

---------

Co-authored-by: Félix Malfait <felix.malfait@gmail.com>

packages/twenty-website/src/content/developers/self-hosting/self-hosting-var.mdx

@@ -6,6 +6,15 @@ image: /images/user-guide/table-views/table.png
 
 import OptionTable from '@site/src/theme/OptionTable'
 
+# Setup Messaging & Calendar sync
+
+Twenty offers integrations with Gmail and Google Calendar. To enable these features, you need to connect to register the following recurring jobs:
+```
+# from your worker container
+yarn command:prod cron:messaging:messages-import
+yarn command:prod cron:messaging:message-list-fetch
+```
+
 # Setup Environment Variables
 
 ## Frontend
@@ -96,9 +105,9 @@ import OptionTable from '@site/src/theme/OptionTable'
 
   You will need to provision an [App Password](https://support.google.com/accounts/answer/185833).
   - EMAIL_SMTP_HOST=smtp.gmail.com
-  - EMAIL_SERVER_PORT=465
-  - EMAIL_SERVER_USER=gmail_email_address
-  - EMAIL_SERVER_PASSWORD='gmail_app_password'
+  - EMAIL_SMTP_PORT=465
+  - EMAIL_SMTP_USER=gmail_email_address
+  - EMAIL_SMTP_PASSWORD='gmail_app_password'
 
   </ArticleTab>
 
@@ -106,9 +115,9 @@ import OptionTable from '@site/src/theme/OptionTable'
 
     Keep in mind that if you have 2FA enabled, you will need to provision an [App Password](https://support.microsoft.com/en-us/account-billing/manage-app-passwords-for-two-step-verification-d6dc8c6d-4bf7-4851-ad95-6d07799387e9).
     - EMAIL_SMTP_HOST=smtp.office365.com
-    - EMAIL_SERVER_PORT=587
-    - EMAIL_SERVER_USER=office365_email_address
-    - EMAIL_SERVER_PASSWORD='office365_password'
+    - EMAIL_SMTP_PORT=587
+    - EMAIL_SMTP_USER=office365_email_address
+    - EMAIL_SMTP_PASSWORD='office365_password'
 
   </ArticleTab>
 
@@ -118,8 +127,8 @@ import OptionTable from '@site/src/theme/OptionTable'
     - Run the smtp4dev image: `docker run --rm -it -p 8090:80 -p 2525:25 rnwood/smtp4dev`
     - Access the smtp4dev ui here: [http://localhost:8090](http://localhost:8090)
     - Set the following env variables:
-      - EMAIL_SERVER_HOST=localhost
-      - EMAIL_SERVER_PORT=2525
+      - EMAIL_SMTP_HOST=localhost
+      - EMAIL_SMTP_PORT=2525
 
   </ArticleTab>
 
@@ -198,3 +207,5 @@ import OptionTable from '@site/src/theme/OptionTable'
     ['CAPTCHA_SITE_KEY', '', 'The captcha site key'],
     ['CAPTCHA_SECRET_KEY', '', 'The captcha secret key'],
 ]}></ArticleTable>
+
+<ArticleEditContent></ArticleEditContent>