[bug#47979] [PATCH] installer: Recommend 'ntp-service-type' for non-graphical systems.

[Leo Famulari <leo@famulari.name>]

We had several bug reports with a root cause of "the clock was
incorrect" from users who used the installer to install a non-graphical
Guix System.

* gnu/installer/services.scm (%system-services): Add the ntp-service-type.
---
 gnu/installer/services.scm | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/gnu/installer/services.scm b/gnu/installer/services.scm
index ec5ea30594..440b8c67db 100644
--- a/gnu/installer/services.scm
+++ b/gnu/installer/services.scm
@@ -2,6 +2,7 @@
 ;;; Copyright © 2018 Mathieu Othacehe <m.othacehe@gmail.com>
 ;;; Copyright © 2019 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+;;; Copyright © 2021 Leo Famulari <leo@famulari.name>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -103,6 +104,11 @@
       (type 'networking)
       (packages '((specification->package "nss-certs")))
       (recommended? #t))
+     (system-service
+       (name (G_ "Network time service, to set the clock automatically"))
+       (type 'network-management)
+       (snippet '((service ntp-service-type)))
+       (recommended? #t))
 
      ;; Network connectivity management.
      (system-service
-- 
2.31.1