Description

• Fixes most npm audit issues in quickstarts and tutorials
• Adds missing package-lock.json files

Also:

• Reduces flakiness of service_invocation/javascript/http/checkout/index.js, which was needed to test my changes (see Timing problem in service_invocation quickstarts #1061)
• Updates buildclient script in tutorials/distributed-calculator/react-calculator (see comment below)

As it stands, all the affected code installs and runs. Tested in the devcontainer.

However, there are still some audit issues in two react app clients, but to fix them would require updating the react-scripts, which is not in my wheelhouse.

• tutorials/distributed-calculator/react-calculator/client
• tutorials/pub-sub/react-form/client

npm audit output includes:

fix available via npm audit fix --force
Will install react-scripts@3.0.1, which is a breaking change

Issue reference

Please reference the issue this PR will close: #1063

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.