📝(frontend) add technical network requirements documentation

Add link to technical notice for our videoconference product describing
network engineering details, required ports, and IP addresses that need to be
allowed in client systems. Helps users properly configure their environments.

src/frontend/src/layout/Footer.tsx

@@ -255,6 +255,19 @@ export const Footer = () => {
               {t('links.accessibility')}
             </A>
           </StyledLi>
+          <StyledLi divider>
+            <A
+              externalIcon
+              underline={false}
+              footer="minor"
+              href="https://docs.numerique.gouv.fr/docs/f2baa1b9-f29e-4d58-959d-65d4376fc6b8/"
+              aria-label={
+                t('links.technicalDetails') + ' - ' + t('links.ariaLabel')
+              }
+            >
+              {t('links.technicalDetails')}
+            </A>
+          </StyledLi>
           <StyledLi>
             <A
               externalIcon

src/frontend/src/locales/de/global.json

@@ -36,7 +36,8 @@
       "data": "",
       "accessibility": "",
       "ariaLabel": "",
-      "code": ""
+      "code": "",
+      "technicalDetails": ""
     },
     "mentions": "",
     "license": ""

src/frontend/src/locales/en/global.json

@@ -36,7 +36,8 @@
       "data": "Personal Data and Cookies",
       "accessibility": "Accessibility: audit in progress",
       "ariaLabel": "new window",
-      "code": "Open Source Code Repository"
+      "code": "Open Source Code Repository",
+      "technicalDetails": "Technical Notice"
     },
     "mentions": "Unless otherwise stated, the contents of this site are available under",
     "license": "etalab 2.0 license"

src/frontend/src/locales/fr/global.json

@@ -36,7 +36,8 @@
       "data": "Données personnelles et cookie",
       "accessibility": "Accessibilités : audit en cours",
       "ariaLabel": "nouvelle fenêtre",
-      "code": "Dépôt de code Open Source"
+      "code": "Dépôt de code Open Source",
+      "technicalDetails": "Fiche Technique"
     },
     "mentions": "Sauf mention contraire, les contenus de ce site sont disponibles sous",
     "license": "licence etalab 2.0"