Add base kubernetes support

services/training/app/core/config.py

@@ -19,9 +19,23 @@ class TrainingSettings(BaseServiceSettings):
     SERVICE_NAME: str = "training-service"
     DESCRIPTION: str = "Machine learning model training service"
     
-    # Database Configuration
-    DATABASE_URL: str = os.getenv("TRAINING_DATABASE_URL",
-                                  "postgresql+asyncpg://training_user:training_pass123@training-db:5432/training_db")
+    # Database configuration (secure approach - build from components)
+    @property
+    def DATABASE_URL(self) -> str:
+        """Build database URL from secure components"""
+        # Try complete URL first (for backward compatibility)
+        complete_url = os.getenv("TRAINING_DATABASE_URL")
+        if complete_url:
+            return complete_url
+
+        # Build from components (secure approach)
+        user = os.getenv("TRAINING_DB_USER", "training_user")
+        password = os.getenv("TRAINING_DB_PASSWORD", "training_pass123")
+        host = os.getenv("TRAINING_DB_HOST", "localhost")
+        port = os.getenv("TRAINING_DB_PORT", "5432")
+        name = os.getenv("TRAINING_DB_NAME", "training_db")
+
+        return f"postgresql+asyncpg://{user}:{password}@{host}:{port}/{name}"
     
     # Redis Database (dedicated for training cache)
     REDIS_DB: int = 1