1.7.0: Fix up requires in build.js

An earlier version used npx, but the current version requires node.

1.6.0: Add crude no data message

This also defines what happens to the sidebar when there is no
connection.

1.5.0

Copy text to clipboard on click

1.4.0: Print output to stdout on close

This allows vawk to be used directly as an intermediate step.

1.3.0: Shutdown server on browser close

This makes the closing behavior bidirectional.  The server should close
if the websocket connection is severed.

1.2.0

Add filter combinator

1.1.0

Make port configurable

all-web

Change it up