fix(nginx): update nginx config to never return 404

nginx/default.conf

@@ -2,13 +2,13 @@ server {
   listen      80;
   server_name localhost;
 
+  location    /api {
+      proxy_pass    http://127.0.0.1:3000;
+  }
+
   location    / {
     root      /client;
-    index index.html;
+    try_files $uri $uri/ /index.html
     expires   30d;
   }
-
-  location    /api {
-      proxy_pass    http://127.0.0.1:3000;
-  }
 }