Keep old INSTALL.md as a tombstone

docs/INSTALL.md

@@ -1,10 +1,15 @@
----
-title: Installation
-has_children: true
-nav_order: 2
-permalink: /installation
----
-
 # Installation
 
-This section contains documentation on installing a new Dendrite deployment.
+Please note that new installation instructions can be found
+on the [new documentation site](https://matrix-org.github.io/dendrite/),
+or alternatively, in the [installation](installation/) folder:
+
+1. [Planning your deployment](installation/1_planning.md)
+2. [Setting up the domain](installation/2_domainname.md)
+3. [Preparing database storage](installation/3_database.md)
+4. [Generating signing keys](installation/4_signingkey.md)
+5. [Installing as a monolith](installation/5_install_monolith.md)
+6. [Installing as a polylith](installation/6_install_polylith.md)
+7. [Populate the configuration](installation/7_configuration.md)
+8. [Starting the monolith](installation/8_starting_monolith.md)
+9. [Starting the polylith](installation/9_starting_polylith.md)

docs/_config.yml

@@ -15,3 +15,5 @@ aux_links_new_tab: true
 sass:
   sass_dir: _sass
   style: compressed
+exclude:
+  - INSTALL.md

docs/installation.md

@@ -0,0 +1,10 @@
+---
+title: Installation
+has_children: true
+nav_order: 2
+permalink: /installation
+---
+
+# Installation
+
+This section contains documentation on installing a new Dendrite deployment.