add opensearch default value (#5536)

api/.env.example

 WEB_API_CORS_ALLOW_ORIGINS=http://127.0.0.1:3000,*
 CONSOLE_CORS_ALLOW_ORIGINS=http://127.0.0.1:3000,*
 
-# Vector database configuration, support: weaviate, qdrant, milvus, relyt, pgvecto_rs, pgvector
+# Vector database configuration, support: weaviate, qdrant, milvus, relyt, pgvecto_rs, pgvector, pgvector, chroma, opensearch, tidb_vector
 VECTOR_STORE=weaviate
 
 # Weaviate configuration
 CHROMA_AUTH_PROVIDER=chromadb.auth.token_authn.TokenAuthenticationServerProvider
 CHROMA_AUTH_CREDENTIALS=difyai123456
 
+# OpenSearch configuration
+OPENSEARCH_HOST=127.0.0.1
+OPENSEARCH_PORT=9200
+OPENSEARCH_USER=admin
+OPENSEARCH_PASSWORD=admin
+OPENSEARCH_SECURE=true
+
 # Upload configuration
 UPLOAD_FILE_SIZE_LIMIT=15
 UPLOAD_FILE_BATCH_LIMIT=5

docker/docker-compose.yaml

       TENCENT_COS_SECRET_ID: 'your-secret-id'
       TENCENT_COS_REGION: 'your-region'
       TENCENT_COS_SCHEME: 'your-scheme'
-      # The type of vector store to use. Supported values are `weaviate`, `qdrant`, `milvus`, `relyt`.
+      # The type of vector store to use. Supported values are `weaviate`, `qdrant`, `milvus`, `relyt`,`pgvector`, `chroma`, 'opensearch', 'tidb_vector'.
       VECTOR_STORE: weaviate
       # The Weaviate endpoint URL. Only available when VECTOR_STORE is `weaviate`.
       WEAVIATE_ENDPOINT: http://weaviate:8080
       TENCENT_COS_SECRET_ID: 'your-secret-id'
       TENCENT_COS_REGION: 'your-region'
       TENCENT_COS_SCHEME: 'your-scheme'
-      # The type of vector store to use. Supported values are `weaviate`, `qdrant`, `milvus`, `relyt`, `pgvector`.
+      # The type of vector store to use. Supported values are `weaviate`, `qdrant`, `milvus`, `relyt`, `pgvector`, `chroma`, 'opensearch', 'tidb_vector'.
       VECTOR_STORE: weaviate
       # The Weaviate endpoint URL. Only available when VECTOR_STORE is `weaviate`.
       WEAVIATE_ENDPOINT: http://weaviate:8080