test) stabilize vitest db bootstrap in ci

src/lib/server/db/index.ts

@@ -3,10 +3,12 @@ import { createSqliteDb } from './sqlite.js';
 import { runMigrations } from './migrations.js';
 import type { Database } from './types.js';
 
-function createDb(): Database {
-	const url = env.DATABASE_URL ?? 'file:trips.db';
+const isVitest = process.env.VITEST === 'true';
 
-	if (url.startsWith('file:') || url.endsWith('.db')) {
+function createDb(): Database {
+	const url = isVitest ? ':memory:' : (env.DATABASE_URL ?? 'file:trips.db');
+
+	if (url === ':memory:' || url.startsWith('file:') || url.endsWith('.db')) {
 		return createSqliteDb(url);
 	}
 
@@ -17,7 +19,9 @@ function createDb(): Database {
 
 export let db: Database = createDb();
 
-runMigrations(db);
+if (!isVitest) {
+	runMigrations(db);
+}
 
 /**
  * Replace the database singleton. For use in tests only — call this with an