ReferenceError: extend is not defined

[Meierschlumpf]

Hey I've got an issue with the latest version of dockerode 4.0.3. In 4.0.2 my application works as expected and runs, but in 4.0.3 it throws the following error:

ReferenceError: extend is not defined
  at ../../packages/api/node_modules/dockerode/lib/docker.js (/app/apps/websocket/wssServer.cjs:476359:12)
  at __require (/app/apps/websocket/wssServer.cjs:18:51)
  at Object.<anonymous> (/app/apps/websocket/wssServer.cjs:518958:32)
  at Module._compile (node:internal/modules/cjs/loader:1562:14)
  at Object..js (node:internal/modules/cjs/loader:1699:10)
  at Module.load (node:internal/modules/cjs/loader:1313:32)
  at Function._load (node:internal/modules/cjs/loader:1123:12)
  at TracingChannel.traceSync (node:diagnostics_channel:322:14)
  at wrapModuleLoad (node:internal/modules/cjs/loader:217:24)
  at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:170:5)

The wssServer.cjs is build using the following command:

esbuild src/main.ts --bundle --platform=node --outfile=wssServer.cjs --external:bcrypt --external:@opentelemetry/api --external:cpu-features --loader:.html=text --loader:.scss=text --loader:.node=text

[apocas]

Published v4.0.4 that fixes this.
#784