Add 'serverless' support

[jaguililla]

Add 'serverless' by using a "fake" server adapter (like the Servlets one) that takes a request from command line arguments.

Check this snippet to set up development environment: https://gist.github.com/crypticmind/c75db15fd774fe8f53282c3ccbe3d7ad and https://hashnode.localstack.cloud/creating-aws-lambda-function-urls-with-localstack

• https://docs.aws.amazon.com/lambda/latest/dg/services-apigateway.html#apigateway-example-event
• https://cloud.google.com/functions/docs/writing/write-http-functions#http-example-java
• https://github.com/apache/openwhisk-runtime-java
• https://github.com/serverless/examples

[hrada777]

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