Fess Site Search(FSS) provides JS file to deploy Search features on your web site. FSS JS is a JavaScript file. Putting it to your web site, search results provided by Fess are available. FSS Generator provides FSS JS file.
See FSS Generator.
$ docker build -t fss .
$ docker run -d -p 5000:5000 fss
and then access http://localhost:5000.
$ ./install.sh
$ export FLASK_APP=app/__init__.py
$ flask run