Remove publicserver example (we get this for free with CRA)

docker/Nginx/docker-compose-publicserver.yml

@@ -1,13 +0,0 @@
-version: '3.5'
-
-services:
-  viewer:
-    container_name: ohif-viewer
-    build:
-      context: ../
-      dockerfile: Dockerfile
-    ports:
-      - '80:80'
-    environment:
-      - NODE_ENV=production
-      - REACT_APP_CONFIG=config/public_dicomweb