References:
The /bin/bash Theory -- Using Overlayfs With LXC
DigitalOcean -- How To Install DokuWiki with Nginx on an Ubuntu 12.04 VPS

• Create the dokuwiki development container using an Overlayfs clone of nginx14lts

  $ sudo su
  # lxc-clone -o 14lts64-nginx -n dokuwiki -B overlayfs -s

  which produced the below output

  Created container dokuwiki as snapshot of 14lts64-nginx

  # exit

• The default user & password for this just created container will be ubuntu & ubuntu

• Start this just created container & Log-in to it:

  $ sudo lxc-start -n dokuwiki -d
  $ sudo lxc-console -n dokuwiki

• Change the default password for the ubuntu user:

  $ passwd

  • set the password to something else (and remember it).
  • logout & log back in to ensure the password was set correctly.

• Replace the Nginx configuration file for the Virtual Server with an edited (for DokuWiki) version

  $ sudo mv /etc/nginx/sites-available/virtual /etc/nginx/sites-available/virtual.old
  $ sudo nano /etc/nginx/sites-available/virtual     # put the following into this empty file

  /etc/nginx/sites-available/virtual

  ##
  # You should look at the following URL's in order to grasp a solid understanding
  # of Nginx configuration files in order to fully unleash the power of Nginx.
  # http://wiki.nginx.org/Pitfalls
  # http://wiki.nginx.org/QuickStart
  # http://wiki.nginx.org/Configuration
  #
  # Generally, you will want to move this file somewhere, and start with a clean
  # file but keep this around for reference. Or just disable in sites-enabled.
  #
  # Please see /usr/share/doc/nginx-doc/examples/ for more detailed examples.
  ##
   
  # Default server configuration
  #
  server {
          listen 80 default_server;
          listen [::]:80 default_server;
   
          # SSL configuration
          #
          # listen 443 ssl default_server;
          # listen [::]:443 ssl default_server;
          #
          # Self signed certs generated by the ssl-cert package
          # Don't use them in a production server!
          #
          # include snippets/snakeoil.conf;
   
          root /var/www/html;
   
          # Add index.php to the list if you are using PHP
          index doku.php;
   
          server_name dokuwiki.lxc;
   
          # nice URL rewrite
          location @dokuwiki {
                  rewrite ^/_media/(.*) /lib/exe/fetch.php?media=$1 last;
                  rewrite ^/_detail/(.*) /lib/exe/detail.php?media=$1 last;
                  rewrite ^/_export/([^/]+)/(.*) /doku.php?do=export_$1&id=$2 last;
                  rewrite ^/(.*) /doku.php?id=$1&$args last;
          }
   
          # Security Rules from www.dokuwiki.org/security#deny_directory_access_in_nginx
          location ~ /(data|conf|bin|inc)/ {
            deny all;
          }
   
          location / {
                  # First attempt to serve request as file, then
                  # as directory, then try the nice URL rewite.
                  try_files $uri $uri/ @dokuwiki;
          }
          location ~ /\.ht {
                  # deny access to .htaccess files, if Apache's document root
                  # concurs with nginx's one
                          deny all;
          }
   
          # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
          #
          location ~ \.php$ {
                  try_files $uri =404;
          #       # With php5-cgi alone:
          #       fastcgi_pass 127.0.0.1:9000;
                  # With php5-fpm:
                  fastcgi_pass unix:/var/run/php5-fpm.sock;
                  fastcgi_index index.php;
                  fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
                  include fastcgi_params;
          }
  }

• Now restart the nginx & php-fpm services:

  $ sudo service nginx restart
  $ sudo service php5-fpm restart

• download the latest stable version of DokuWiki into ~/

  $ wget http://download.dokuwiki.org/src/dokuwiki/dokuwiki-stable.tgz

  This produced the following output:

  --2015-05-19 21:40:30--  http://download.dokuwiki.org/src/dokuwiki/dokuwiki-stable.tgz
  Resolving download.dokuwiki.org (download.dokuwiki.org)... 46.4.55.201, 2a01:4f8:140:13e4::b00b
  Connecting to download.dokuwiki.org (download.dokuwiki.org)|46.4.55.201|:80... connected.
  HTTP request sent, awaiting response... 200 OK
  Length: 3283317 (3.1M) [application/octet-stream]
  Saving to: ‘dokuwiki-stable.tgz’
  
  100%[===================================================>] 3,283,317    618KB/s   in 6.5s   
  
  2015-05-19 21:40:39 (496 KB/s) - ‘dokuwiki-stable.tgz’ saved [3283317/3283317]

• From the download tarball, extract the directory structure by typing

  $ tar xzvf dokuwiki-stable.tgz

• Now delete the tarball by typing

  $ rm dokuwiki-stable.tgz

• change the name of the directory to where the wiki will be stored – which will be /var/www/html/ for the webserver root

  $ mv doku* html

• remove the “testing” files in the webserver root (below mv command needs empty directory)

  $ sudo rm -R /var/www/html/*

• move this directory into the web root, and set ownership – to allow access to this by typing dokuwiki.lxc

  $ sudo mv html  /var/www/
  $ sudo chown -R  www-data:www-data /var/www/html

• http://dokuwiki.lxc/install.php

• Once the DokuWiki installer has been run, delete the install.php file

  $ sudo rm /var/www/html/install.php

• Log-in to the just created DokuWiki site
• Admin » Configuration Settings
  • In the Display section:
    • Number of “trace” breadcrumbs. Set to 0 to disable. → set to 0
    • Use hierarchical breadcrumbs … → SELECT this
    • Top level for table of contents → 2
    • Use first heading for pagenames → set to Always
    • By default, DokuWiki will show all namespaces in the sitemap. … → SELECT this option
  • In the Links section:
    • Target window for external links → set to _blank
  • In the Advanced section:
    • Use nice URLs → set to .htaccess
    • Size in bytes up to which images referenced in CSS files should be embedded right into the stylesheet → set to 512
    • Use gzip Content-Encoding for xhtml → SELECT this