diff --git a/.gitlab-ci.main.kts b/.gitlab-ci.main.kts
--- a/.gitlab-ci.main.kts
+++ b/.gitlab-ci.main.kts
@@ -10,7 +10,7 @@
 import opensavvy.gitlab.ci.script.shell
 
 // https://gitlab.com/opensavvy/automation/containers/-/releases
-val ciContainers = "0.8.2"
+val ciContainers = "0.8.4"
 
 /**
  * The URL of the website built by /docs/website.
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -12,7 +12,7 @@
 
 variables:
   # https://gitlab.com/opensavvy/automation/containers
-  ci_containers: 0.8.2
+  ci_containers: 0.8.4
 
 workflow:
   rules:
diff --git a/.idea/runConfigurations/Documentation_website.xml b/.idea/runConfigurations/Documentation_website.xml
--- a/.idea/runConfigurations/Documentation_website.xml
+++ b/.idea/runConfigurations/Documentation_website.xml
@@ -8,7 +8,7 @@
           <list>
             <DockerPortBindingImpl>
               <option name="containerPort" value="8000" />
-              <option name="hostPort" value="7999" />
+              <option name="hostPort" value="8000" />
             </DockerPortBindingImpl>
           </list>
         </option>
diff --git a/.idea/runConfigurations/Open_documentation_website.xml b/.idea/runConfigurations/Open_documentation_website.xml
--- a/.idea/runConfigurations/Open_documentation_website.xml
+++ b/.idea/runConfigurations/Open_documentation_website.xml
@@ -1,5 +1,5 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="Open documentation website" type="JavascriptDebugType" uri="http://localhost:7999">
+  <configuration default="false" name="Open documentation website" type="JavascriptDebugType" engineId="98ca6316-2f89-46d9-a9e5-fa9e2b0625b3" uri="http://localhost:8000">
     <method v="2">
       <option name="RunConfigurationTask" enabled="true" run_configuration_name="Documentation website" run_configuration_type="docker-deploy" />
     </method>
diff --git a/docs/website/mkdocs.yml b/docs/website/mkdocs.yml
--- a/docs/website/mkdocs.yml
+++ b/docs/website/mkdocs.yml
@@ -13,16 +13,18 @@
     - content.code.annotate
     - content.code.copy
     - content.code.select
-    # - content.footnote.tooltips
+    - content.footnote.tooltips
     - content.tabs.link
     - content.tooltips
     # - header.autohide
     # - navigation.expand
     - navigation.footer
     - navigation.indexes
-    # - navigation.instant
-    # - navigation.instant.prefetch
-    # - navigation.instant.progress
+    - navigation.instant
+    - navigation.instant.prefetch
+    - navigation.instant.progress
+    - navigation.instant.preview
+    - navigation.path
     # - navigation.prune
     - navigation.sections
     - navigation.tabs
@@ -60,14 +62,16 @@
         name: "Dark theme (click to switch to system)"
 
 plugins:
-  # - social # https://github.com/squidfunk/mkdocs-material/issues/7818
+  - social
   - search
   - privacy
+  - optimize
   - blog:
       post_excerpt: optional
       authors: false
       blog_dir: news
-  - tags
+  - tags:
+      tags_hierarchy: true
   - rss:
       match_path: 'news/posts/.*'
       date_from_meta: