docs(ecs): make examples compile

[kaizencc]

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[gitpod-io]

[kaizencc]

So GenericLogDriver.ts is not exported in index.ts. Relevant PR. Originally I thought, why not just export it and well, it causes a circular dependency (gives error: Class extends value undefined is not a constructor or null). I have no idea why. In fact, it doesn't look like GenericLogDriver or GenericLogDriverProps (the only two classes in the file) are referenced anywhere in the CDK. The file itself isn't even tested. Maybe it's safe to delete the file, but then again, how is there a circular dependency if it is not referenced anywhere?

This is all spooky to me so I did not end up touching it at all. As it stands, GenericLogDriver is not exposed therefore it shouldn't be referenced in the README.

[rix0rrr]

I think it's probably useful to have a GenericLogDriver -- we should strive to have some "escape hatch" style class everywhere, so that users can roll their own if ECS tomorrow rolls out a new feature and we haven't implemented it yet.

Let's have a look-see at what's going on here.

[rix0rrr]

Oh I know. This is the issue in generic-log-driver.ts:

import { LogDriver, LogDriverConfig } from '../index';

It reads it from the main index.ts, which is in turn including the file we are currently in (generic-log-driver.ts). This is the cyclic bit.

Basically import from an index file at the same lever or higher should never be allowed--potentially we could allow importing from deeper index files. But this is the issue. Should have been:

import { LogDriver, LogDriverConfig } from './log-driver';

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