add CI/CD workflows, production docker-compose, and update dev compose with Gitea registry and monitoring improvements

.env.example

@@ -14,6 +14,12 @@ CLOUDFLARE_API_TOKEN=your-cloudflare-api-token
 CLOUDFLARE_ACCOUNT_ID=your-account-id
 MEDIA_DOMAIN=media.example.com
 
+# Gitea Container Registry (for self-hosted Docker images)
+GITEA_REGISTRY_URL=git.allucanget.biz
+GITEA_USERNAME=your-gitea-username
+GITEA_TOKEN=your-gitea-token
+GITEA_REGISTRY_NAMESPACE=zwitschi/linearvoid
+
 # Chat / Application Database (PostgreSQL or SQLite for local)
 DATABASE_URL=postgres://user:password@localhost:5432/linearvoid
 # Or for SQLite (local development):
@@ -39,4 +45,9 @@ GRAFANA_PORT=3001
 
 # Development flags
 NODE_ENV=development
-GO_ENV=development
+GO_ENV=development
+
+# Gitea Configuration
+GITEA_SERVER_URL=https://git.allucanget.biz
+GITEA_TOKEN=your-gitea-token
+GITEA_USERNAME=your-gitea-username