Add configuration examples for Oracle, TiDB, PostgreSQL and storage backends

.env.example

@@ -72,6 +72,45 @@ LOG_LEVEL=INFO
 # AZURE_EMBEDDING_DEPLOYMENT=text-embedding-3-large
 # AZURE_EMBEDDING_API_VERSION=2023-05-15
 
-
 # Ollama Emulating Model Tag
 # OLLAMA_EMULATING_MODEL_TAG=latest
+
+# Oracle Database Configuration
+ORACLE_DSN=localhost:1521/XEPDB1
+ORACLE_USER=your_username
+ORACLE_PASSWORD=your_password
+ORACLE_CONFIG_DIR=/path/to/oracle/config
+ORACLE_WALLET_LOCATION=/path/to/wallet  # 可选
+ORACLE_WALLET_PASSWORD=your_wallet_password  # 可选
+ORACLE_WORKSPACE=default  # 可选,默认为default
+
+# TiDB Configuration
+TIDB_HOST=localhost
+TIDB_PORT=4000
+TIDB_USER=your_username
+TIDB_PASSWORD=your_password
+TIDB_DATABASE=your_database
+TIDB_WORKSPACE=default  # 可选,默认为default
+
+# PostgreSQL Configuration
+POSTGRES_HOST=localhost
+POSTGRES_PORT=5432
+POSTGRES_USER=your_username
+POSTGRES_PASSWORD=your_password
+POSTGRES_DATABASE=your_database
+POSTGRES_WORKSPACE=default  # 可选,默认为default
+
+# Database Configurations
+# Neo4j
+NEO4J_URI=neo4j+s://xxxxxxxx.databases.neo4j.io
+NEO4J_USERNAME=neo4j
+NEO4J_PASSWORD=your-password
+
+# MongoDB (可选)
+MONGODB_URI=mongodb+srv://name:password@your-cluster-address
+MONGODB_DATABASE=lightrag
+MONGODB_GRAPH=false
+
+# Qdrant
+QDRANT_URL=http://localhost:16333
+QDRANT_API_KEY=your-api-key  # 可选