Create .env.example

.env.example

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+# JWT Configuration
+JWT_SECRET=your-very-long-random-secret-key-change-this-in-production
+JWT_ALGORITHM=HS256
+JWT_EXPIRATION_HOURS=24
+
+# Encryption Key for Cloud Tokens
+FLARE_TOKEN_KEY=your-32-byte-base64-fernet-key
+
+# Spark Integration
+SPARK_TOKEN=your-huggingface-token-for-spark-service
+
+# Environment
+ENVIRONMENT=development