Reworked javascript workflow examples to use a webserver

[olitomlinson]

Description

Workflows are better expressed in the context of a webserver (this is how 99% of users will host and author workflows) therefore I've included working examples of how to do this, using native express and Dapr Server.

Issue reference

N/A

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• [ ] The quickstart code compiles correctly
• [ ] You've tested new builds of the quickstart if you changed quickstart code
• [ ] You've updated the quickstart's README if necessary
• [ ] If you have changed the steps for a quickstart be sure that you have updated the automated validation accordingly. All of our quickstarts have annotations that allow them to be executed automatically as code. For more information see mechanical-markdown. For user guide with examples see Examples.