🔨 Run once, graceful shutdown, db filename in env

- Refactored toISODateString function
- Added Db filename to env
- Added getOrDefault function for fetching envs, replaced LOG_LEVEL with getOrDefault
- Added script to run job once then exit
- Catch SIGINT signal and do a graceful shutdown

config.ts

@@ -3,12 +3,14 @@ import dotenv from "dotenv"
 
 dotenv.config()
 
+// Actual
 export const ACTUAL_SYNC_ID = getOrThrow("ACTUAL_SYNC_ID")
 export const ACTUAL_SERVER_URL = getOrThrow("ACTUAL_SERVER_URL")
 export const ACTUAL_PASSWORD = getOrThrow("ACTUAL_PASSWORD")
 export const ACTUAL_ACCOUNT_IDS = getArrayOrThrow("ACTUAL_ACCOUNT_IDS")
-export const ACTUAL_DATA_DIR = ".cache"
+export const ACTUAL_DATA_DIR = getOrDefault("ACTUAL_DATA_DIR", ".cache")
 
+// Bank
 export const BANK_INITIAL_REFRESH_TOKEN = getOrThrow(
   "BANK_INITIAL_REFRESH_TOKEN",
 )
@@ -16,6 +18,14 @@ export const BANK_OAUTH_CLIENT_ID = getOrThrow("BANK_OAUTH_CLIENT_ID")
 export const BANK_OAUTH_CLIENT_SECRET = getOrThrow("BANK_OAUTH_CLIENT_SECRET")
 export const BANK_ACCOUNT_IDS = getArrayOrThrow("BANK_ACCOUNT_IDS")
 
+// Configuration
+export const DB_FILENAME = getOrDefault("DB_FILENAME", "default")
+export const LOG_LEVEL = getOrDefault("LOG_LEVEL", "info")
+
+function getOrDefault(key: string, def: string): string {
+  return process.env[key] || def
+}
+
 function getOrThrow(key: string): string {
   const value = process.env[key]
   assert(value, `Missing environment variable: ${key}`)