Add nginx compression and fix package.json scripts

nginx.conf

@@ -1,11 +1,15 @@
 server {
     listen 80;
     server_name _;
-
     root /usr/share/nginx/html;
     index index.html;
 
+    # Serve static assets
     location / {
         try_files $uri $uri/ /index.html;
     }
+
+    # Gzip compression
+    gzip on;
+    gzip_types text/plain text/css application/json application/javascript text/xml application/xml;
 }