first commit

backend/app/core/config.py

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+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+class Settings(BaseSettings):
+    model_config = SettingsConfigDict(env_file=".env", extra="ignore")
+
+    APP_ENV: str = "dev"
+    APP_NAME: str = "mt-traffic"
+    BASE_URL: str = "http://localhost:8000"
+
+    DATABASE_URL: str = "sqlite+aiosqlite:///./mt_traffic.db"
+    DOCKER_DATABASE_URL: str = "sqlite+aiosqlite:////data/mt_traffic.db"
+
+    SESSION_SECRET: str = "change_me"
+    CREDENTIALS_MASTER_KEY: str = "change_me_32bytes_base64_fernet"
+    PASSWORD_HASH_ALG: str = "argon2"
+
+    COOKIE_SECURE: bool = False
+    COOKIE_SAMESITE: str = "lax"
+    CORS_ORIGINS: str = "http://localhost:3000"
+
+    DEFAULT_POLL_INTERVAL_MS: int = 1000
+    MAX_WS_SUBSCRIPTIONS_PER_USER: int = 10
+
+    ADMIN_BOOTSTRAP_EMAIL: str = "admin@example.com"
+    ADMIN_BOOTSTRAP_PASSWORD: str = "admin1234"
+
+settings = Settings()