🔧(env) disable the DINUM-specific footer by default

the footer used is very specific to the DINUM/French gov instance so it
should not be enabled by default for everyone.

it's still a bit weird to keep this footer in the code here but at least
it removes the issue easily. any PR to clean the code is appreciated :)

docs/installation.md

@@ -281,6 +281,7 @@ These are the environmental options available on meet backend.
 | FRONTEND_SILENCE_LIVEKIT_DEBUG                  | Silence LiveKit debug logs               | false                                                                                                                                                         |
 | FRONTEND_IS_SILENT_LOGIN_ENABLED                | Enable silent login feature             | true                                                                                                                                                          |
 | FRONTEND_FEEDBACK                               | Frontend feedback configuration          | {}                                                                                                                                                            |
+| FRONTEND_USE_FRENCH_GOV_FOOTER                  | Show the French government footer in the homepage | false |
 | DJANGO_EMAIL_BACKEND                            | Email backend library                    | django.core.mail.backends.smtp.EmailBackend                                                                                                                   |
 | DJANGO_EMAIL_HOST                               | Host of the email server                 |                                                                                                                                                               |
 | DJANGO_EMAIL_HOST_USER                          | User to connect to the email server      |                                                                                                                                                               |

env.d/development/common.dist

@@ -57,3 +57,5 @@ SCREEN_RECORDING_BASE_URL=http://localhost:3000/recordings
 
 # Telephony
 ROOM_TELEPHONY_ENABLED=True
+
+FRONTEND_USE_FRENCH_GOV_FOOTER=False

src/backend/meet/settings.py

@@ -324,6 +324,9 @@ class Base(Configuration):
         "feedback": values.DictValue(
             {}, environ_name="FRONTEND_FEEDBACK", environ_prefix=None
         ),
+        "use_french_gov_footer": values.BooleanValue(
+            False, environ_name="FRONTEND_USE_FRENCH_GOV_FOOTER", environ_prefix=None
+        ),
     }
 
     # Mail

src/frontend/src/api/useConfig.ts

@@ -17,6 +17,7 @@ export interface ApiConfig {
   silence_livekit_debug_logs?: boolean
   is_silent_login_enabled?: boolean
   custom_css_url?: string
+  use_french_gov_footer?: boolean
   recording?: {
     is_enabled?: boolean
     available_modes?: RecordingMode[]

src/frontend/src/layout/Footer.tsx

@@ -1,6 +1,7 @@
 import { styled } from '@/styled-system/jsx'
 import { css } from '@/styled-system/css'
 import { A, Link } from '@/primitives'
+import { useConfig } from '@/api/useConfig'
 import { useTranslation } from 'react-i18next'
 
 const StyledLi = styled('li', {
@@ -120,6 +121,10 @@ const Marianne = () => {
 
 export const Footer = () => {
   const { t } = useTranslation('global', { keyPrefix: 'footer' })
+  const { data } = useConfig()
+  if (!data?.use_french_gov_footer) {
+    return null
+  }
 
   return (
     <footer