Add /container-token/{token} API endpoint

[jason-seqera]

@munishchouhan, I'm not sure what a token is in this context. It doesn't seem to be this:

$ wave -f Dockerfile-ubuntu
wave.seqera.io/wt/febca4652eda/wave/build:3d682cc62eaabcda

[munishchouhan]

@munishchouhan, I'm not sure what a token is in this context. It doesn't seem to be this:

$ wave -f Dockerfile-ubuntu
wave.seqera.io/wt/febca4652eda/wave/build:3d682cc62eaabcda

Token is generated by wave e.g. febca4652eda for above example

[jason-seqera]

@munishchouhan, oh, weird, I got an error back from the API that the token does not exist.

[munishchouhan]

closed by mistake, reopened again