cannot make karura node 2.27.0

[TurtleSnail]

How to make node?

# make build-karura-release
make: *** No rule to make target 'build-karura-release'.  Stop.

used to work

[zjb0807]

we use the https://github.com/AcalaNetwork/acala-node to build the node now.

you can download the repo and refer to the Dockerfile
https://github.com/AcalaNetwork/acala-node/blob/master/Dockerfile#L7

[xlc]

I've updated the readme. Let us know if you need more details.