doc: update README.md install procedure

Add instructions directing the reader to install the "python3-routes"
package. This package is required in order to launch the dashboard after
the installation procedure has completed, but is not yet included in the
install-deps.sh script.

Signed-off-by: Zac Dover <zac.dover@proton.me>
(cherry picked from commit 0b0009bf1fb0cd54cdf0014bd724b00805a3dbd1)

diff --git a/README.md b/README.md
index c4c69185009257ca7dcb5716b36ba0ce89209b3f..4ee7e070da4aa1b512b3d4776913144e76e68ff8 100644 (file)
--- a/README.md
+++ b/README.md
@@ -38,10 +38,22 @@ Ceph contains many git submodules that need to be checked out with
 
 ## Build Prerequisites
 
-The list of Debian or RPM packages dependencies can be installed with:
+*section last updated 27 Jul 2023*
+
+Make sure that ``curl`` is installed. The Debian and Ubuntu ``apt`` command is
+provided here, but if you use a system with a different package manager, then
+you must use whatever command is the proper counterpart of this one:
+
+    apt install curl
+
+Install Debian or RPM package dependencies by running the following command:
 
        ./install-deps.sh
 
+Install the ``python3-routes`` package:
+
+    apt install python3-routes
+
 
 ## Building Ceph