ci: fix working-directory

.github/workflows/build-master.yml

@@ -227,6 +227,7 @@ jobs:
           DATABASE_URL: postgresql://affine:affine@localhost:5432/affine
       - name: Run init-db script
         run: yarn exec ts-node-esm ./scripts/init-db.ts
+        working-directory: apps/server
         env:
           DATABASE_URL: postgresql://affine:affine@localhost:5432/affine
       - name: Run server tests