no sudo when run lightwalletd with NGINX

as Duke mentioned there is no need for sudo when using nginx, so let's remove sudo from the command to give users the best copy-paste experience ;)

README.md

@@ -80,7 +80,7 @@ server {
 Then run the lightwalletd frontend with the following (Note: we use the "-no-tls" option as we are using NGINX as a reverse proxy and letting it handle the TLS authentication):
 
 ```
-$ sudo go run cmd/server/main.go -bind-addr your_host.net:9067 -conf-file ~/.komodo/HUSH3/HUSH3.conf -no-tls
+$ go run cmd/server/main.go -bind-addr your_host.net:9067 -conf-file ~/.komodo/HUSH3/HUSH3.conf -no-tls
 ```
 
 ##### Option B: "Let's Encrypt" certificate just using lightwalletd without NGINX