app.py

import panel as pn
import pandas as pd
import altair as alt

# we want to use bootstrap/template, tell Panel to load up what we need
pn.extension(design='bootstrap')

# we want to use vega, tell Panel to load up what we need
pn.extension('vega')

# create a basic template using bootstrap
template = pn.template.BootstrapTemplate(
    title='SI649 test',
)

maincol = pn.Column()

maincol.append("# Markdown Title")

template.main.append(maincol)

# Indicate that the template object is the "application" and serve it
template.servable(title="SI649 test")