fixup doc build for mkdocs 1.5

docs/install/linux.md

@@ -159,10 +159,6 @@ wish to use one of these AUR options:
 
 APKs are no longer being built/supported by CI. You can still build it for yourself from source!
 
-|Version | Stable        | Nightly |
-|--------|---------------|---------|
-| 3.15   |[{{ alpine3_15_apk_stable_asset }}]({{ alpine3_15_apk_stable }})|No longer produced by CI|
-
 ## Linuxbrew Tap
 
 If you are a [Linuxbrew](https://docs.brew.sh/Homebrew-on-Linux) user, you can install

docs/mkdocs-base.yml

@@ -72,6 +72,19 @@ plugins:
         - "book.toml"
         - "overrides/**"
 
+exclude_docs: |
+  **/_index.md
+  **/*.markdown
+  generate_toc.py
+  README.markdown
+  build.sh
+  SUMMARY.md
+  book.toml
+  overrides/**
+
+not_in_nav: |
+  tags.md
+
 extra_css:
   - style.css
   - colorschemes/scheme.css