feat: full backend (untested)

backend/src/app/config.py

@@ -0,0 +1,13 @@
+from pydantic_settings import BaseSettings
+
+
+class Settings(BaseSettings):
+    database_url: str = "postgresql+asyncpg://postgres:postgres@db:5432/availability"
+    sync_database_url: str = "postgresql://postgres:postgres@db:5432/availability"
+    ics_refresh_interval_minutes: int = 15
+
+    class Config:
+        env_file = ".env"
+
+
+settings = Settings()