Missing configuration file onlyoffice-docs-formats.json causes startup error

Description

When attempting to start the ONLYOFFICE DocumentServer, the application fails due to a missing configuration file: onlyoffice-docs-formats.json.

Steps to Reproduce

1. Clone the latest version of the ONLYOFFICE/DocumentServer repository.
2. Follow the setup instructions to build and start the application.
3. Observe the startup error due to the missing onlyoffice-docs-formats.json file.

Expected Behavior

The application should start without any errors.

Actual Behavior

The application fails to start, and the following error message is displayed:

Environment
ONLYOFFICE DocumentServer version: 8.2
Operating System: docker
Java version: idea + jdk 11

Additional Context

The issue seems to be related to the following code section:

private static final String DOCS_FORMATS_JSON_PATH = "assets/document-formats/onlyoffice-docs-formats.json";
/** Defines a list containing data about supported formats. */
private static List<Format> formats;

static {
    init();
}

protected static void init() {
    ObjectMapper objectMapper = new ObjectMapper();

    InputStream inputStream =  Thread
            .currentThread()
            .getContextClassLoader()
            .getResourceAsStream(DOCS_FORMATS_JSON_PATH);

    if (inputStream == null) {
        inputStream = DefaultDocumentManager.class
                .getClassLoader()
                .getResourceAsStream(DOCS_FORMATS_JSON_PATH);
    }

    try {
        formats = objectMapper.configure(DeserializationFeature.READ_UNKNOWN_ENUM_VALUES_AS_NULL, true)
                .readValue(inputStream, new TypeReference<List<Format>>() { });
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
}

Start at DefaultDocumentManager.init() and the DOCS_FORMATS_JSON_PATH constant, then inspect how assets/document-formats/onlyoffice-docs-formats.json is expected to be packaged. Reproduce the documented Docker startup and verify that the missing-resource error is gone and the application starts successfully.