Vagrantfile to install nginx, configure javascript custom modules, and a hello world example

Vagrantfile

# vagrant box add --name ol76 --checksum cfb58aaa12f56702afd739966273df63cd3ff3362e6a5a3fa6fa9ffcec4762e3 --checksum-type sha256 https://yum.oracle.com/boxes/oraclelinux/ol76/ol76.box
# https://nginx.org/en/docs/njs/examples.html#subrequest

Vagrant.configure("2") do |config|
  config.vm.box = "ol76"
  config.vm.network "forwarded_port", guest: 80, host: 8111, host_ip: "127.0.0.1"
  config.vm.synced_folder ".", "/vagrant_data"

  config.vm.provision "shell", inline: <<-SHELL
    sudo cat > /etc/yum.repos.d/nginx.repo <<EOF
[nginx-stable]
name=nginx stable repo
baseurl=http://nginx.org/packages/rhel/7/\\$basearch/
gpgcheck=0
enabled=1
gpgkey=https://nginx.org/keys/nginx_signing.key
EOF

    sudo yum -y install nginx
    sudo yum -y install nginx-module-njs

    sudo cat > /etc/nginx/nginx.conf <<EOF
load_module /etc/nginx/modules/ngx_http_js_module.so;
load_module /etc/nginx/modules/ngx_stream_js_module.so;
user  nginx;
worker_processes  1;

error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;

events {
    worker_connections  1024;
}

http {
    js_include add-headers.js;
    js_set \\$is_tom     is_tom;
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;
    log_format  main  '\\$remote_addr - \\$remote_user [\\$time_local] "\\$request" '
                      '\\$status \\$body_bytes_sent "\\$http_referer" '
                      '"\\$http_user_agent" "\\$http_x_forwarded_for"';
    access_log  /var/log/nginx/access.log  main;
    sendfile        on;
    keepalive_timeout  65;
    server {
        listen       80;
        server_name  localhost;

        location / {
    	      add_header X-Is-Tom \\$is_tom;
            root   /usr/share/nginx/html;
            index  index.html index.htm;
        }

    }
}
EOF

    sudo cat > /etc/nginx/add-headers.js <<EOF
function is_tom(r) {
  return "true";
}
EOF

    sudo systemctl start nginx

    echo "---------------------"
    echo "run this command from your host OS to observe the custom header"
    echo "curl -v localhost:8111 2>&1 | grep -i tom"
    echo "---------------------"

  SHELL
end