This guide is for OSX machines

1. Install Homebrew http://brew.sh/

2. Install NGINX with homebrew: brew install nginx

3. Open /usr/local/etc/nginx/nginx.conf with your favourite editor and add the server configuration:

   server {
       listen 80;
       # don´t use *.local on mac - its reserved
       server_name www.mywebsite.mobile;
   
       location / {
               proxy_pass http://www.mywebsite.dev/;
       }
   }
   

4. Start nginx via sudo nginx

5. Optionally: test if your config is OK by typing sudo nginx -t

6. Go to the settings of your mobile device and enter the IP of your local machine as HTTP proxy

7. Open www.mywebsite.mobile (or whatever you have entered above)