Add base kubernetes support

services/external/app/core/config.py

@@ -16,11 +16,23 @@ class DataSettings(BaseServiceSettings):
     # API Configuration
     API_V1_STR: str = "/api/v1"
     
-    # Override database URL to use EXTERNAL_DATABASE_URL
-    DATABASE_URL: str = Field(
-        default="postgresql+asyncpg://external_user:external_pass123@external-db:5432/external_db",
-        env="EXTERNAL_DATABASE_URL"
-    )
+    # 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("EXTERNAL_DATABASE_URL")
+        if complete_url:
+            return complete_url
+
+        # Build from components (secure approach)
+        user = os.getenv("EXTERNAL_DB_USER", "external_user")
+        password = os.getenv("EXTERNAL_DB_PASSWORD", "external_pass123")
+        host = os.getenv("EXTERNAL_DB_HOST", "localhost")
+        port = os.getenv("EXTERNAL_DB_PORT", "5432")
+        name = os.getenv("EXTERNAL_DB_NAME", "external_db")
+
+        return f"postgresql+asyncpg://{user}:{password}@{host}:{port}/{name}"
     
     # External API Configuration
     AEMET_API_KEY: str = os.getenv("AEMET_API_KEY", "")