feat: enhance openshift support (#1063)

### Description of the change

Add options to values.yaml to make chart easier to install in restricted openshift environments

### Benefits

more people can run this

### Checklist

<!-- [Place an '[X]' (no spaces) in all applicable fields. Please remove unrelated fields.] -->

- [x] Parameters are documented in the `values.yaml` and added to the `README.md` using [readme-generator-for-helm](https://github.com/bitnami-labs/readme-generator-for-helm)
- [ ] Breaking changes are documented in the `README.md`
- [x] Helm templating unittests are added (required when changing anything in `templates` folder)
- [ ] Bash unittests are added (required when changing anything in `scripts` folder)
- [x] All added template resources MUST render a namespace in metadata

---------

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Reviewed-on: https://gitea.com/gitea/helm-gitea/pulls/1063
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.com>
Co-committed-by: techknowlogick <techknowlogick@gitea.com>

unittests/helm/config/server-section_domain.yaml

@@ -65,3 +65,41 @@ tests:
         matchRegex:
           path: stringData.server
           pattern: \nROOT_URL=http://provided.example.com
+
+  ################################################
+
+  - it: "[route enabled] uses route host for DOMAIN|SSH_DOMAIN|ROOT_URL"
+    template: templates/gitea/config.yaml
+    set:
+      route:
+        enabled: true
+        host: route.example.com
+    asserts:
+      - documentIndex: 0
+        matchRegex:
+          path: stringData.server
+          pattern: \nDOMAIN=route.example.com
+      - documentIndex: 0
+        matchRegex:
+          path: stringData.server
+          pattern: \nSSH_DOMAIN=route.example.com
+      - documentIndex: 0
+        matchRegex:
+          path: stringData.server
+          pattern: \nROOT_URL=http://route.example.com
+
+  ################################################
+
+  - it: "[route tls termination] uses https for ROOT_URL"
+    template: templates/gitea/config.yaml
+    set:
+      route:
+        enabled: true
+        host: route.example.com
+        tls:
+          termination: edge
+    asserts:
+      - documentIndex: 0
+        matchRegex:
+          path: stringData.server
+          pattern: \nROOT_URL=https://route.example.com