Docs: Docker link broken

[roughpandaz]

Issue

Docker link in guide goes to 404 error page:
Alternatively, you can also use [Docker](https://github.com/nervosnetwork/ckb/blob/develop/docs/run-ckb-with-docker.md) if your operating system
Github docs link

Solution

Link to docker hubhttps://hub.docker.com/r/nervos/ckb

Question

CKB Docker says it's running EagleSong algorithm for mining. However, the docs recommend to run Dummy-Worker. Am I missing something?

[eval-exec]

Dummy-Worker is used for development scenarios. EagleSong is used in CKB mainnet.