private String getHtmlTemplate() {
        if (template == null) {
            final InputStream is = getClass().getResourceAsStream("swagger-ui-template.html");
            template = StreamUtil.streamToString(is);
            CloseableUtil.closeLogAndIgnoreException(is);
        }
        return template;
    }
Note: {@link RedirectServlet} will re-direct to here to support legacy servlet paths,
i.e. /stroom/noauth/swagger-ui/xxx
stroom-core/src/main/java/stroom/core/servlet/SwaggerUiServlet.java