Client Always Looks for Server at "/" 

### Current Situation

Right now the expected location of the server is hard coded to be `/`. This should be changed to look at `../` relative to the current page.

### Proposed Actions

Change this line to use `document.location.pathname` somehow: https://github.com/idom-team/idom/blob/main/src/client/packages/idom-app-react/src/index.js#L7

### Work Items

Same as above.