diff --git a/ai-service/app/api/openapi/share_page.py b/ai-service/app/api/openapi/share_page.py
index 61bc71e..71dcffb 100644
--- a/ai-service/app/api/openapi/share_page.py
+++ b/ai-service/app/api/openapi/share_page.py
@@ -24,6 +24,7 @@ from app.api.mid.dialogue import (
     get_trace_logger,
     respond_dialogue,
 )
+from app.core.config import get_settings
 from app.core.database import get_session
 from app.core.tenant import clear_tenant_context, set_tenant_context
 from app.models.mid.schemas import DialogueRequest, HistoryMessage
@@ -78,7 +79,12 @@ async def create_public_share_token(request: Request, body: CreatePublicShareTok
         expires_in_minutes=body.expires_in_minutes,
     )
 
-    base_url = str(request.base_url).rstrip("/")
+    # Use configured base URL if available, otherwise fallback to request base_url
+    settings = get_settings()
+    if settings.share_link_base_url:
+        base_url = settings.share_link_base_url.rstrip("/")
+    else:
+        base_url = str(request.base_url).rstrip("/")
     share_url = f"{base_url}/openapi/v1/share/chat?token={token}"
     return CreatePublicShareTokenResponse(
         share_token=token,
diff --git a/ai-service/app/core/config.py b/ai-service/app/core/config.py
index 27bcb13..a21421d 100644
--- a/ai-service/app/core/config.py
+++ b/ai-service/app/core/config.py
@@ -67,6 +67,9 @@ class Settings(BaseSettings):
 
     frontend_base_url: str = "http://localhost:3000"
 
+    # Share link base URL (for container deployment, use external domain)
+    share_link_base_url: str = ""
+
 
 @lru_cache
 def get_settings() -> Settings: