adding docker-compose readme and fixing docker-compose context

docker/README.md

@@ -0,0 +1,13 @@
+# Docker compose files
+
+This folder contains docker-compose files used to spin up OHIF-Viewer with differnt options such as locally or with any PAS you desire to
+
+## Public Server
+#### build
+
+`$ docker-compose -f docker-compose-publicserver.yml build`
+
+#### run
+`$ docker-compose -f docker-compose-publicserver.yml up -d`
+
+then, access the application at (http://localhost)[http://localhost]