add tracing feature to streamlit apps

Author: ks6088ts

.env.template

@@ -6,6 +6,7 @@
 PROJECT_NAME=template-langgraph
 
 ## LangSmith Settings
+LANGSMITH_TRACING="false" # Options: "true", "false"
 LANGSMITH_API_KEY="lsv2_xxx"
 
 # ---------

docs/references.md

@@ -49,6 +49,7 @@
   - [Jaeger / Minimal deployment example (Elasticsearch backend)](https://www.jaegertracing.io/docs/1.72/deployment/#minimal-deployment-example-elasticsearch-backend)
 - [Prometheus](https://prometheus.io/)
   - [Prometheus / Getting Started](https://prometheus.io/docs/prometheus/latest/getting_started/)
+- [Trace with LangGraph](https://docs.langchain.com/langsmith/trace-with-langgraph)
 
 ### n8n
 

template_langgraph/services/streamlits/main.py

@@ -1,4 +1,9 @@
 import streamlit as st
+from dotenv import load_dotenv
 
+load_dotenv(
+    override=True,
+    verbose=True,
+)
 st.title("template-streamlit")
 st.info("Select a code sample from the sidebar to run it")