public AbstractHttpFileBuilder autoDetectedContentType(boolean contentTypeAutoDetectionEnabled) {
        this.contentTypeAutoDetectionEnabled = contentTypeAutoDetectionEnabled;
        return this;
    }
Sets whether to set the {@code "content-type"} header automatically based on the extension of the file.
By default, the {@code "content-type"} header is set automatically.
core/src/main/java/com/linecorp/armeria/server/file/AbstractHttpFileBuilder.java