Headers are not added

[punkpeye]

const docker = new Docker({
  headers: {
    'x-token': '...',
  },
  host: '...',
  protocol: 'https',
});

I would expect that the headers are added to every request made by Docker.

However, the server does not receive the x-token header. This is all the server sees:

host: ...
upgrade: h2c
content-length: 0
x-docker-expose-session-uuid: 36ed41f2-b35b-4196-8231-61dfb6210337
x-docker-expose-session-name: testcontainers

[punkpeye]

Looking at the implementation, that headers value doesn't seem to be passed anywhere?

[punkpeye]

Here specifically

dockerode/lib/session.js

Lines 9 to 22 in 7d73e87

	const opts = {
	method: "POST",
	path: "/session",
	hijack: true,
	headers: {
	Upgrade: "h2c",
	"X-Docker-Expose-Session-Uuid": sessionId,
	"X-Docker-Expose-Session-Name": "testcontainers",
	},
	statusCodes: {
	200: true,
	500: "server error",
	},
	};

[punkpeye]

@apocas Would you accept a PR for this?