Install the latest nginx with passenger and some extensions.

etc-init.d-nginx

#! /bin/sh

### BEGIN INIT INFO
# Provides:          nginx
# Required-Start:    $all
# Required-Stop:     $all
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: starts the nginx web server
# Description:       starts nginx using start-stop-daemon
### END INIT INFO

PATH=/usr/local/rvm/bin:/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/usr/sbin/nginx
NAME=nginx
DESC=nginx
PID_FILE=/var/run/$NAME.pid

test -x $DAEMON || exit 0

# Include nginx defaults if available
if [ -f /etc/default/nginx ] ; then
        . /etc/default/nginx
fi

set -e

case "$1" in
  start)
        echo -n "Starting $DESC: "
        start-stop-daemon --start --quiet --pidfile $PID_FILE \
                --exec $DAEMON -- $DAEMON_OPTS
        echo "$NAME."
        ;;
  stop)
        echo -n "Stopping $DESC: "
        start-stop-daemon --stop --quiet --pidfile $PID_FILE \
                --exec $DAEMON
        echo "$NAME."
        ;;
  restart|force-reload)
        echo -n "Restarting $DESC: "
        start-stop-daemon --stop --quiet --pidfile $PID_FILE \
                --exec $DAEMON
        sleep 1
        start-stop-daemon --start --quiet --pidfile $PID_FILE\
                --exec $DAEMON -- $DAEMON_OPTS
        echo "$NAME."
        ;;
  reload)
          echo -n "Reloading $DESC configuration: "
          start-stop-daemon --stop --signal HUP --quiet --pidfile $PID_FILE \
                --exec $DAEMON
          echo "$NAME."
          ;;
      *)
            N=/etc/init.d/$NAME
            echo "Usage: $N {start|stop|restart|reload|force-reload}" >&2
            exit 1
            ;;
    esac

    exit 0

etc-nginx-vhosts-example.com.conf

server {
    listen 443 ssl spdy;
    server_name example.com;

    passenger_ruby /usr/local/rvm/wrappers/ruby-2.1.1/ruby;

    ssl_certificate ssl/certs/ssl1-4096.crt;
    ssl_certificate_key ssl/private/ssl1-4096.key;
    add_header Strict-Transport-Security "max-age=31536000";

    root /home/app-name/app/public;

    passenger_enabled on;
    passenger_min_instances 1;

    passenger_set_cgi_param HTTP_X_FORWARDED_PROTO $scheme;

    passenger_user app-name;
    passenger_group app-name;

    access_log /home/app-name/access.log;
    error_log /home/app-name/error.log;

    location ~ ^/assets/ {
        gzip_static on;
        expires 1y;
        add_header Cache-Control public;
        add_header  ETag "";
    }
}

server {
    listen 80;
    server_name example.com;
    return 301 https://example.com;
}

passenger_pre_start https://example.com/;

passenger-nginx-install.sh

#!/bin/sh

NGINX_VERSION=1.5.12
DL_PATH=~/nginx

# Fetch and extract Nginx
cd $DL_PATH

if [ ! -d "nginx-$NGINX_VERSION" ]; then
  wget http://nginx.org/download/nginx-$NGINX_VERSION.tar.gz
  tar xvfz nginx-$NGINX_VERSION.tar.gz
fi

cd nginx-$NGINX_VERSION

# Install the latest passenger gem
gem install passenger

# Configure passenger (with ubuntu-style paths)
rvmsudo passenger-install-nginx-module \
  --auto \
  --nginx-source-dir=$DL_PATH/nginx-$NGINX_VERSION \
  --prefix=/usr \
  --extra-configure-flags=" \
    --conf-path=/etc/nginx/nginx.conf \
    --pid-path=/var/run/nginx.pid \
    --sbin-path=/usr/sbin \
    --error-log-path=/var/log/nginx/error.log \
    --http-log-path=/var/log/nginx/access.log \
    --with-http_spdy_module \
    --with-http_realip_module \
    --with-http_gzip_static_module \
    --without-mail_pop3_module \
    --without-mail_smtp_module \
    --without-mail_imap_module"