Add devigo deployment role for mini-vps production environment

- Created comprehensive devigo Ansible role with Podman Quadlet support
- Deployed devigo-site container (Hugo + nginx) via systemd
- Deployed devigo-decap-oauth OAuth2 proxy for Decap CMS
- Integrated with Caddy reverse proxy for HTTPS

Services deployed:
- devigo.no (apex domain, primary)
- www.devigo.no (redirects to apex)
- decap.jnss.me (OAuth proxy)

Key features:
- REGISTRY_AUTH_FILE environment for Podman GHCR authentication
- TRUSTED_ORIGINS (plural) for decapcms-oauth2 multi-origin support
- JavaScript-based Decap CMS initialization (eliminates YAML MIME dependency)
- nginx location block for YAML MIME type (text/yaml)
- Automated deployment via GitHub Actions CI/CD
- Comprehensive documentation with troubleshooting guide
- Architecture decision records

Fixes applied during deployment:
- OAuth origin trust validation (TRUSTED_ORIGINS vs TRUSTED_ORIGIN)
- MIME type handling strategy (location-specific vs server-level types block)
- Decap CMS initialization method (JavaScript vs link tag)
- Podman authentication for systemd services (REGISTRY_AUTH_FILE)

Testing status:
- ✅ MIME types verified (HTML, CSS, YAML all correct)
- ✅ OAuth authentication working
- ✅ Container image pulls from private GHCR
- ✅ Automated deployments functional
- ✅ Site fully operational at devigo.no

roles/devigo/templates/devigo.caddy.j2

@@ -0,0 +1,33 @@
+# Devigo Website - Reverse Proxy to Containerized Site
+# Generated by Ansible - DO NOT EDIT MANUALLY
+
+# Redirect www to apex (apex is primary per user preference)
+{{ devigo_www_domain }} {
+    redir https://{{ devigo_domain }}{uri} permanent
+}
+
+# Primary domain (apex)
+{{ devigo_domain }} {
+    reverse_proxy localhost:9080
+    
+    # Security headers
+    header {
+        X-Frame-Options SAMEORIGIN
+        X-Content-Type-Options nosniff
+        X-XSS-Protection "1; mode=block"
+        Referrer-Policy strict-origin-when-cross-origin
+        Permissions-Policy "geolocation=(), microphone=(), camera=()"
+    }
+    
+    # Logging
+    log {
+        output file /var/log/caddy/devigo.log {
+            roll_size 100mb
+            roll_keep 5
+        }
+        format json {
+            time_format "2006-01-02T15:04:05.000Z07:00"
+        }
+        level INFO
+    }
+}