Docs: Add draft nav for "Software Installation" section

Note: I don't think "leveloffset" is allowed like this here. We could
pass it to "include" as an attribute, but I'd rather us standardize our
headings in our files.

Signed-off-by: Remington Steed <rjs7@calvin.edu>

diff --git a/docs-antora/modules/installation/nav.adoc b/docs-antora/modules/installation/nav.adoc
new file mode 100644 (file)
index 0000000..7c7c548
--- /dev/null
+++ b/docs-antora/modules/installation/nav.adoc
@@ -0,0 +1,14 @@
+* Software Installation
+** xref:installation:system_requirements.adoc[System Requirements]
+
+// Push titles down one level.
+:leveloffset: 1
+
+** xref:installation:server_installation.adoc[Installing the Evergreen server]
+
+// Return to normal title levels.
+:leveloffset: 0
+
+** xref:installation:server_upgrade.adoc[Upgrading the Evergreen Server]
+** xref:installation:edi_setup.adoc[Setting Up EDI Acquisitions]
+