Initial public release

Aurum — a self-hosted personal finance operating system: cash flow,
net worth tracking, budgets, goals, recurring payments, reports,
proactive alerts, and a compound-interest returns calculator, all
bilingual (RU/EN) and mobile-first. Ships as a three-container Docker
Compose stack (Postgres + FastAPI + nginx-served React frontend).

See README.md for setup and CONTRIBUTING.md for development.

backend/app/core/config.py

@@ -0,0 +1,44 @@
+"""Application configuration, sourced from environment variables (.env)."""
+from functools import lru_cache
+
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+# Single source of truth for the running app's version — surfaced in the API
+# title and embedded in exported backups so an old file can be told apart
+# from a current one.
+APP_VERSION = "0.15.2"
+
+
+class Settings(BaseSettings):
+    model_config = SettingsConfigDict(env_file=".env", env_prefix="AURUM_", extra="ignore")
+
+    # Postgres connection
+    postgres_user: str = "aurum"
+    postgres_password: str = "aurum"
+    postgres_db: str = "aurum"
+    postgres_host: str = "db"
+    postgres_port: int = 5432
+
+    # Default currency shown across the UI when an account doesn't override it
+    default_currency: str = "USD"
+
+    # Comma-separated list of origins allowed to call the API (frontend dev server, etc.)
+    cors_origins: str = "*"
+
+    @property
+    def database_url(self) -> str:
+        return (
+            f"postgresql+asyncpg://{self.postgres_user}:{self.postgres_password}"
+            f"@{self.postgres_host}:{self.postgres_port}/{self.postgres_db}"
+        )
+
+    @property
+    def cors_origins_list(self) -> list[str]:
+        if self.cors_origins == "*":
+            return ["*"]
+        return [origin.strip() for origin in self.cors_origins.split(",") if origin.strip()]
+
+
+@lru_cache
+def get_settings() -> Settings:
+    return Settings()