Fix #376 Add a Dockerfile to run the Theia browser example
Fix #376 Add a Dockerfile to run the Theia browser example

Created a Dockerfile in the examples/browser/ folder for people to
easily run the Theia browser example with minimal setup. The
instructions included at the top of the Dockerfile will walk the user
through how to get the browser example up and running using Play With
Docker.

Signed-off-by: Remy Suen <553f7e7fc51e9ff47ae89d5a0ebd06651241b998@gmail.com>

epatpol/theia-1,hexa00/theia,lmcgupe/theia,epatpol/theia-1,lmcgupe/theia,hexa00/theia,epatpol/theia-1