Resolve "Learning materials"

Review here

Closes #276 (closed) #236 (closed)

_data/navigation.yml

@@ -11,8 +11,87 @@
 # original Markdown.
 
 header:
-# Note: Header navigation is hardcoded in header.html
-
+  - title: "Helmholtz Services"
+    url: "services/"
+    entries:
+      - title: "Cloud Services Overview"
+        url: "services/cloud-overview"
+      - title: "Cloud Services Access"
+        url: "https://cloud.helmholtz.de/services"
+        external: True
+      - title: "Identity and Access Management (AAI)"
+        url: "https://aai.helmholtz.de/"
+        external: True
+      - title: "Software Engineering"
+        url: "services/software-overview"
+      - title: "Software Engineering Consulting"
+        url: "consulting"
+      - title: "Backbone Services"
+        url: "services/backbone-overview"
+  - title: "Learning & Training"
+    entries:
+      - title: "HIFIS Courses"
+        url: "https://events.hifis.net/category/4/"
+        external: True
+      - title: "More Helmholtz courses"
+        url: "https://www.helmholtz-hida.de/course-catalog"
+        external: True
+      - title: "Learning Materials"
+        url: "services/overall/learning-materials"
+      - title: "FAQ"
+        url: "faq"
+      - title: "Tutorial: Using AAI to login to services"
+        url: "https://aai.helmholtz.de/tutorial/2021/06/23/how-to-helmholtz-aai.html"
+        external: True
+  - title: "About HIFIS"
+    entries:
+      - title: "HIFIS Mission"
+        url: "mission"
+      - title: "Partners"
+        url: "partners"
+      - title: "Who is HIFIS?"
+        url: "team"
+      - title: "Roadmap"
+        url: "roadmap"
+      - title: "Documents"
+        entries:
+          - title: "Organisational Structure"
+            url: "structure"
+          - title: "Publications"
+            url: "publications"
+          - title: "Documentation"
+            url: "documentation"
+          - title: "Reports"
+            url: "reports"
+          - title: "Surveys"
+            url: "services/overall/survey"
+          - title: "Events Archive"
+            url: "events"
+  - title: "Use Cases"
+    entries:
+      - title: "Community Use Cases"
+        url: "usecases"
+      - title: "Software Spotlights"
+        url: "spotlights"
+  - title: "Latest & Media"
+    entries:
+      - title: "News"
+        url: "news/"
+      - title: "Upcoming events"
+        url: "https://events.hifis.net/category/14/"
+        external: True
+      - title: "Subscribe to..."
+        entries:
+          - title: 'Newsletter <i class="fas fa-bell"></i>'
+            url: "https://lists.desy.de/sympa/subscribe/hifis-announce"
+          - title: 'News RSS feed <i class="fas fa-rss"></i>'
+            url: "feed/news.xml"
+      - title: "Media & Materials"
+        url: "media"
+      - title: "Careers"
+        url: "job_offers"
+  - title: "Can we help you?"
+    url: "contact"
 
 footer:
          - title: Contact