code: def bkapp_page():
      script = server_document(f"http://localhost:{port}/bkapp")
      return render_template(
          "embed.html", script=script, template="Flask"
      )
  
file_path: bokeh/examples/server/api/flask_gunicorn_embed.py
imports: import asyncio
  from threading import Thread
  from flask import Flask, render_template
  from tornado.httpserver import HTTPServer
  from tornado.ioloop import IOLoop
  from bokeh.application import Application
  from bokeh.application.handlers import FunctionHandler
  from bokeh.embed import server_document
  from bokeh.layouts import column
  from bokeh.models import ColumnDataSource, Slider
  from bokeh.plotting import figure
  from bokeh.sampledata.sea_surface_temperature import sea_surface_temperature
  from bokeh.server.server import BaseServer
  from bokeh.server.tornado import BokehTornado
  from bokeh.server.util import bind_sockets
  from bokeh.themes import Theme
label_desc: Use image node_id 2 for calling a global function with example usage: bkapp_page() and returns: render_template