Document howt to set up a service on OpenShift

conf.py

@@ -367,7 +367,7 @@ def setup(app):
    'ticket': ('https://control.vshn.net/tickets/%s', ''),
    'vshn': ('https://control.vshn.net/tickets/%s', ''),
    'ansible-repo-file': ('https://git.tocco.ch/gitweb?p=ansible.git;a=blob;f=%s', '/'),
-   'ansible-repo-dir': ('https://git.tocco.ch/gitweb?p=ansible.git;a=blob;a=tree;f=%s', '/'),
+   'ansible-repo-dir': ('https://git.tocco.ch/gitweb?p=ansible.git;a=tree;f=%s', '/'),
    'hierra-repo': ('https://git.vshn.net/tocco/tocco_hieradata/blob/master/%s', ''),
    'tocco-manual': ('https://223.docs.tocco.ch/en/%s', ''),
    'java': ('https://docs.oracle.com/en/java/javase/11/docs/api/java.base/%s.html', ''),

devops/index.rst

@@ -6,6 +6,7 @@ DevOps
 
    infrastructure/index
    app_management/index
+   service_setup
    server_access
    internal_servers/index
    continuous_delivery/index