forgejo: Basic SOP for installation of the forgejo instances.

Signed-off-by: David Kirwan <davidkirwanirl@gmail.com>

modules/sysadmin_guide/pages/forgejo.adoc

@@ -0,0 +1,3 @@
+= Forgejo Related SOPs
+
+- xref:sop_forgejo_installation.adoc[SOP Forgejo Installation]

modules/sysadmin_guide/pages/sop_forgejo_installation.adoc

@@ -0,0 +1,19 @@
+= Forgejo Server Installation
+
+== Resources
+- [1] Official Installation Instructions: https://codeberg.org/fedora/forgejo-helm#installing
+- [2] Playbook: https://pagure.io/fedora-infra/ansible/blob/main/f/playbooks/openshift-apps/forgejo.yml
+- [3] Role: https://pagure.io/fedora-infra/ansible/blob/main/f/roles/openshift-apps/forgejo
+- [4] Forgejo upstream: https://codeberg.org/forgejo/forgejo
+- [5] Fedora forgejo fork: https://codeberg.org/fedora/forgejo
+- [6] Forgejo helm chart: https://code.forgejo.org/forgejo-helm/forgejo-helm/
+- [7] Fedora fork of forgejo helm-chart: https://codeberg.org/fedora/forgejo-helm
+- [8] Installation configuration: https://pagure.io/fedora-infra/ansible/blob/main/f/roles/openshift-apps/forgejo/templates/values.yaml.j2
+
+== Installation
+The playbook,role at [2],[3] contains everything required to create an instance of the Forgejo gitforge on Openshift in staging/prod, and should also integrate it with FAS. Members of the group `sysadmin-main` may run this playbook, although this can be changed later.
+
+
+== Configuration
+The configuration being passed into helm, can be modified at [8].
+