fix: add config.ts with config variable (BASE_DIR...)

server/config.ts

@@ -0,0 +1,13 @@
+import fs from 'fs'
+import path from 'path'
+
+const _isBunBinary = typeof (globalThis as any).Bun !== 'undefined'
+    && path.dirname((process as any).execPath) !== process.cwd()
+
+export const BASE_DIR = _isBunBinary
+    ? path.dirname((process as any).execPath)
+    : process.cwd()
+
+export const DATA_DIR = fs.existsSync('/.dockerenv')
+    ? '/config'
+    : path.join(BASE_DIR, 'data')