fix: add serve

[wtrocki]

Add very basic cli that will help us to run server using model file

[darahayes]

Is it possible to assign a port instead of having one randomly generated?

[wtrocki]

+100.

[b1zzu]

The server start() method should be already abel to accpet a custom port, and if not is very easy to do it

[darahayes]

@wtrocki if you can take do something like port = argv.port || '4001' and then call it a day

[b1zzu]

The TestxServer start is calling the GraphbackServer start function which accepts a fixed port, is just a matter of adding the argument to the TestxServer start and pass it through

graphql-testx/src/TestxServer.ts

Line 101 in db2a503

await this.server.start();

graphql-testx/src/GraphbackServer.ts

Line 32 in db2a503

public async start(port?: number): Promise<void> {

[b1zzu]

Suggested change

	startServer(fileContent);
	startServer(fileContent).catch(e => throw e);

an alternative would be to log the error and stack and then exit with something different from 0, the only problem with the current way is that nodejs will give an error like not handled exception in promise which is not so nice

[b1zzu]

the best approach will be to create a main function

async function main() {
  // everything here
}

main().catch(e => {throw e});

[b1zzu]

@wtrocki this is really great

[wtrocki]

This is just example what we can do. I do not intent to merge it here.
I was thinking about separate package. More info here:

aerogear/graphback#659

[b1zzu]

What about moving the file read part inside Testx itself?
#97