Fix link to crawl dashboard for local install

[wmburke]

The link currently points to /banana, which is fine unless you also need to define the port because it's a local install.

Can we get this to work in both cases?

[giuseppetotaro]

@wmburke, the link points to "/banana" because of the web server configuration where "/banana" is proxied to 8983 port. This means that users should have root access to modify the web server configuration by adding a 1 to 1 mapping.
Theoretically we could tell docker to proxy internal to always use 8983 on host but in that case you only can have one process on that port. I think this is not a critical requirement so I believe we should keep things as is and trust the end proxy configuration.
@wmburke and @sujen1412 please feel free to add your comments and/or close the issue if you agree with my explanation.

[rduerr]

hmmm.... is this related to #41 by some chance?