Add backend and frontend skeleton

app/backend/core/config.py

@@ -0,0 +1,23 @@
+"""Environment configuration derived from environment variables."""
+
+from functools import lru_cache
+
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+class Settings(BaseSettings):
+    """Application settings."""
+
+    service_name: str = "backend"
+    environment: str = "development"
+    database_url: str = (
+        "postgresql+psycopg://postgres:postgres@postgres:5432/avaaz"
+    )
+
+    model_config = SettingsConfigDict(env_prefix="", case_sensitive=False)
+
+
+@lru_cache(maxsize=1)
+def get_settings() -> Settings:
+    """Return cached settings instance."""
+    return Settings()