Make server port (8080) public

Gitpod recently changed their default port visibility from public to
private. This made it impossible for the front end to automatically
connect to the trace server. Making the port used by the server (8080)
public solves this issue.

Fixes #415

Signed-off-by: Erica Bugden <erica.bugden@gmail.com>

.gitpod.yml

@@ -12,6 +12,7 @@ ports:
   onOpen: ignore
 - port: 8080 # Trace Compass server
   onOpen: ignore
+  visibility: public
 tasks:
 - init: >
     yarn download:server