chore: add example env vars for OAuth2.0 with client secret (#1053)

python/langsmith/cli/.env.example

@@ -1,9 +1,11 @@
 # Don't change this file. Instead, copy it to .env and change the values there. The default values will work out of the box as long as you provide your license key.
 _LANGSMITH_IMAGE_VERSION=0.7.39 # Change to the desired Langsmith image version
 LANGSMITH_LICENSE_KEY=your-license-key # Change to your Langsmith license key
-AUTH_TYPE=none # Set to oauth if you want to use OAuth2.0. Set to mixed for basic auth.
-OAUTH_CLIENT_ID=your-client-id # Required if AUTH_TYPE=oauth
-OAUTH_ISSUER_URL=https://your-issuer-url # Required if AUTH_TYPE=oauth
+AUTH_TYPE=none # Set to oauth if you want to use OAuth2.0 with PKCE. Set to mixed for basic auth or OAuth2.0 with OAuth2.0 client secret
+OAUTH_CLIENT_ID=your-client-id # Required if AUTH_TYPE=oauth or mixed with OAuth2.0 with OAuth2.0 client secret
+OAUTH_ISSUER_URL=https://your-issuer-url # Required if AUTH_TYPE=oauth or mixed with OAuth2.0 with OAuth2.0 client secret
+OAUTH_CLIENT_SECRET=your-client-secret # Required if AUTH_TYPE=mixed with OAuth2.0 with OAuth2.0 client secret
+LANGSMITH_URL=http://localhost:1980 # Change to your hosted Langsmith URL. Required if AUTH_TYPE=mixed with OAuth2.0 client secret
 API_KEY_SALT=super # Change to your desired API key salt. Can be any random value. Must be set if AUTH_TYPE=oauth
 POSTGRES_DATABASE_URI=postgres:postgres@langchain-db:5432/postgres # Change to your database URI if using external postgres. Otherwise, leave it as is
 REDIS_DATABASE_URI=redis://langchain-redis:6379 # Change to your Redis URI if using external Redis. Otherwise, leave it as is

python/langsmith/cli/docker-compose.yaml

@@ -78,7 +78,6 @@ services:
       - AUTH_TYPE=${AUTH_TYPE:-none}
       - OAUTH_CLIENT_ID=${OAUTH_CLIENT_ID}
       - OAUTH_CLIENT_SECRET=${OAUTH_CLIENT_SECRET}
-      - OAUTH_CALLBACK_URL=${OAUTH_CALLBACK_URL}
       - OAUTH_ISSUER_URL=${OAUTH_ISSUER_URL}
       - API_KEY_SALT=${API_KEY_SALT}
       - X_SERVICE_AUTH_JWT_SECRET=${API_KEY_SALT}