Failed to start javascript-tutorial-server following the instructions in README

### Description
* **Environment:**
* OS: macOS Sequoia 15.2 (24C101)
* Browser: Google Chrome 131.0.6778.266
* javascript-tutorial-server version: 2.0.0
* Node.js version: v22.6.0
* **Steps:**
1. Followed the instructions in [README](https://github.com/javascript-tutorial/server/blob/master/README.md#installation)
* **Expected behavior:**
1. After running ./edit ja, the server should start and articles should be accessible.
* **Actual behavior:**
1. The following log was output and the process did not proceed further:
- Although I provided an example in ja, I encountered the same issue when trying with en.

```
06:21:02.238Z INFO importWatch: Import complete
```

Start with the README installation instructions and reproduce the issue using ./edit ja, noting the reported Node.js and macOS versions. Investigate why the process stops after “Import complete”; done means the server starts and articles are accessible as expected.

Written by the indexing model from the issue text.