Minimal nginx configuration showing some basic things

nginx.conf

# Save this as nginx.conf
# stop with: sudo nginx -s stop
# start with: sudo nginx -p . -c nginx.conf

events {
   worker_connections  1024;
}

http {
   server {
       listen 80;

       location /stuff {
         root .;
         autoindex on;
       }

       location = / {
           return 302 http://localhost/hello/world;
       }

       location = /hello/world {
          if ($arg_planet = "mars") {
            return 200 "Hello martian";
          } 

          add_header Set-Cookie "abc=123;Path=/;";
          return 200 "Hello earthian";          
       }
   }
}