message: add in logic to do npm install
diff: #!/usr/bin/env python3
  -
  +import subprocess
  from aws_cdk import core
  from the_xray_tracer.the_xray_tracer_stack import TheXrayTracerStack
  @@ -8,6 +8,9 @@ from the_xray_tracer.the_dynamo_flow_stack import TheDynamoFlowStack
  from the_xray_tracer.the_sns_flow_stack import TheSnsFlowStack
  from the_xray_tracer.the_sqs_flow_stack import TheSqsFlowStack
  +# install node dependencies for lambdas
  +subprocess.check_call("npm i".split(), cwd="lambdas")
  +
  app = core.App()
  xray_tracer = TheXrayTracerStack(app, "the-xray-tracer")
  http_flow = TheHttpFlowStack(app, 'the-http-flow-stack', sns_topic_arn=xray_tracer.sns_topic_arn)
  