Add mirror/homedir to prometheus monitoring

hosts

@@ -101,3 +101,5 @@ secure-runner2.archlinux.org
 phrik.archlinux.org
 quassel.archlinux.org
 state.archlinux.org
+mirror.pkgbuild.com
+homedir.archlinux.org

playbooks/homedir.archlinux.org.yml

@@ -13,3 +13,4 @@
     - { role: archusers }
     - { role: public_html, public_domain: "pkgbuild.com", tags: ['nginx'] }
     - { role: borg_client, tags: ["borg"] }
+    - { role: prometheus_exporters }

playbooks/mirrors.yml

@@ -13,3 +13,4 @@
     - { role: syncrepo, tags: ['nginx'] }
     - { role: archweb, archweb_site: false, archweb_services: false, archweb_mirrorcheck: true }
     - { role: arch32_mirror, tags: ['nginx'] }
+    - { role: prometheus_exporters }