nginx config to go along with lang.lua

test.conf

server {
    listen 80 default_server;

    root /home/ubuntu/test;
    index index.html index.htm;

    error_log /home/ubuntu/test/error.log;
    access_log /home/ubuntu/test/access.log;

    location / {
        set $lang_sup "en,fr";
        lua_code_cache off;
        set_by_lua_file $lang_accept /etc/nginx/lang.lua $lang_sup;
        root /home/ubuntu/test/$lang_accept;
    }
}