Add langsmith tracing support

.env

@@ -133,3 +133,8 @@ SOCIAL_GOOGLE_OAUTH_CLIENT_SECRET=""
 SOCIAL_GITHUB_OAUTH_CALLBACK_URL="${AUTH_URL}/api/auth/callback/github"
 SOCIAL_GITHUB_OAUTH_CLIENT_ID=""
 SOCIAL_GITHUB_OAUTH_CLIENT_SECRET=""
+
+LANGSMITH_TRACING=false
+LANGSMITH_ENDPOINT="https://api.smith.langchain.com"
+LANGSMITH_API_KEY=""
+LANGCHAIN_PROJECT=""

ui/.env.template

@@ -4,3 +4,9 @@ AUTH_TRUST_HOST=true
 
 # openssl rand -base64 32
 AUTH_SECRET=your-secret-key
+
+# Langsmith
+LANGSMITH_TRACING=false
+LANGSMITH_ENDPOINT="https://api.smith.langchain.com"
+LANGSMITH_API_KEY=
+LANGCHAIN_PROJECT=