docs: improve baseURL configuration guidance in batch installation guides

- Add baseURL configuration examples in release-prep.agent.md (localhost, IP, domain)
- Update release-workflow.md with baseURL configuration options
- Update release-workflow.zh.md with baseURL configuration options
- Improve .env.example documentation with URL examples and better instructions
- Support various OpenWebUI instance locations: localhost, remote IP, or domain

scripts/.env.example

@@ -2,7 +2,12 @@
 # 
 # Instructions:
 # - api_key: Copy from OpenWebUI Settings (starts with sk-)
-# - url: OpenWebUI server address
+# - url: OpenWebUI server address (supports localhost, IP, and domain)
+#
+# URL Examples:
+# - Local: http://localhost:3000
+# - Remote IP: http://192.168.1.10:3000
+# - Domain: https://openwebui.example.com
 #
 # Environment variable precedence (highest to lowest):
 # 1. OPENWEBUI_API_KEY / OPENWEBUI_URL environment variables
@@ -13,6 +18,7 @@
 api_key=sk-your-api-key-here
 
 # OpenWebUI server address (required)
+# Configure the baseURL where your OpenWebUI instance is running
 url=http://localhost:3000
 
 # Alternatively, use environment variable format (both methods are equivalent)