feat(langfuse): add sample secrets

Author: NicholasGoh

README.md

@@ -199,6 +199,13 @@ Add your following API keys and value to the respective file: `./envs/backend.en
 ```bash
 OPENAI_API_KEY=sk-proj-...
 POSTGRES_DSN=postgresql://postgres...
+
+LANGFUSE_PUBLIC_KEY=pk-lf-...
+LANGFUSE_SECRET_KEY=sk-lf-...
+LANGFUSE_HOST=https://cloud.langfuse.com
+
+ENVIRONMENT=production
+
 YOUTUBE_API_KEY=...
 ```
 

backend/api/core/config.py

@@ -33,5 +33,11 @@ def checkpoint_conn_str(self) -> str:
         # with specifying psycopg driver explicitly
         return self.postgres_dsn.encoded_string()
 
+    langfuse_public_key: str = ""
+    langfuse_secret_key: str = ""
+    langfuse_host: str = "https://cloud.langfuse.com"
+
+    environment: str = "development"
+
 
 settings = Settings()

envs/backend.env

@@ -1,3 +1,9 @@
 OPENAI_API_KEY=
 # do not specify driver (do not specify `+psycopg`)
 POSTGRES_DSN=
+
+LANGFUSE_PUBLIC_KEY=pk-lf-
+LANGFUSE_SECRET_KEY=sk-lf-
+LANGFUSE_HOST=https://cloud.langfuse.com
+
+ENVIRONMENT=production