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====== DokuWiki Installation ======

This install guide is a how-to for installing DokuWiki Ubuntu server 20.04.

===== Prerequisites =====
Packages required for DokuWiki to work:

  sudo apt install php7.4 php7.4-common php7.4-cli php7.4-gd php7.4-mbstring php7.4-mysql php7.4-xml php7.4-ldap php7.4-fpm
  sudo apt install nginx

===== Compiling mcrypt PHP module =====

First Check whether the mcrypt PHP module is present:

  php -m | grep mcrypt

To install the mcrypt PHP module we first need to satisfy the following prerequisites:

  sudo apt install php-dev libmcrypt-dev php-pear

Now we are ready to install mcrypt PHP module on our Ubuntu 20.04 system:

  sudo pecl channel-update pecl.php.net
  sudo pecl install mcrypt-1.0.4
  
Open the ''/etc/php/7.4/cli/php.ini'' file and insert:

  extension=mcrypt.so

All done. When successful, checking for the presence of the mcrypt PHP module should produce the following output:

  php -m | grep mcrypt
  mcrypt


===== DokuWiki =====
Download and extract DokuWiki stable to the proper directory.
  wget -c https://download.dokuwiki.org/src/dokuwiki/dokuwiki-stable.tgz
  mv dokuwiki-stable.tgz dokuwiki.tgz
  sudo tar -xvf dokuwiki.tgz -C /var/www/

===== Let's Encrypt =====
For SSL use the EFF's PPA for the Let's Encrypt certbot.
  sudo add-apt-repository ppa:certbot/certbot
  sudo apt update; sudo apt upgrade
  sudo apt install python3-certbot-nginx
  sudo certbot --nginx certonly

Cert and Key locations:
  /etc/letsencrypt/live/wiki.domainname.tld/fullchain.pem
  /etc/letsencrypt/live/wiki.domainname.tld/privkey.pem

-------------
source: https://certbot.eff.org/lets-encrypt/ubuntuxenial-nginx

==== Renewing Certificate ====
  sudo certbot renew

===== Configure nginx =====
Need to make the configuration file for nginx to point to the correct files. Make sure to change the domain to the correct one, a generic placeholder wiki.domainname.tld is used for this example config.
  sudo nano /etc/nginx/conf.d/dokuwiki.conf
Paste in the below configuration and save.

  server {
  
  listen 443 ssl;
   server_name wiki.domainname.tld;
   root /var/www/dokuwiki/;
  
  access_log /var/log/nginx/dokuwiki.access.log;
   error_log /var/log/nginx/dokuwiki.error.log;
  
  ssl on;
   ssl_certificate /etc/letsencrypt/live/wiki.domainname.tld/fullchain.pem;
   ssl_certificate_key /etc/letsencrypt/live/wiki.domainname.tld/privkey.pem;
   ssl_session_timeout 5m;
   ssl_ciphers 'AES256+EECDH:AES256+EDH:!aNULL';
   ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
   ssl_prefer_server_ciphers on;
  
  add_header Content-Security-Policy "default-src 'self' 'unsafe-inline' 'unsafe-eval'; img-src 'self' data:;";
  add_header X-XSS-Protection "1; mode=block";
  
  index index.html index.php doku.php;
  
  location / {
   try_files $uri $uri/ @dokuwiki;
   }
  
  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 last;
   }
  
  location ~ /(data|conf|bin|inc)/ {
   deny all;
   }
  
  location ~* \.(css|js|gif|jpe?g|png)$ {
   expires 1M;
   add_header Pragma public;
   add_header Cache-Control "public, must-revalidate, proxy-revalidate";
   }
  
  location ~ \.php$ {
   fastcgi_split_path_info ^(.+\.php)(/.+)$;
   fastcgi_pass unix:/var/run/php/php7.0-fpm.sock;
   fastcgi_index index.php;
   include fastcgi_params;
   fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
   fastcgi_intercept_errors off;
   fastcgi_buffer_size 16k;
   fastcgi_buffers 4 16k;
   }
  
  location ~ /\.ht {
   deny all;
   }
  }
  
  
  server { 
   listen 80;
   server_name wiki.domainname.tld;
   add_header Strict-Transport-Security max-age=2592000;
   rewrite ^ https://wiki.domainname.tld$request_uri? permanent;
  }

Here we are going to change the permissions on the web root files so that the web server can use and modify them. 

  sudo chown -R www-data:www-data /var/www/dokuwiki

Start nginx and php-fpm, and enable php-fpm to start at boot.
  sudo systemctl start nginx php7.4-fpm
  sudo systemctl enable php7.4-fpm


===== Configure DokuWiki =====
Navigate your browser to your https://wiki.domainname.tld/install.php

From there you can configure everything for the initial setup of DokuWiki.

==== Removing the Glow ====
Make userstyle.css in /conf
  sudo vim /var/www/dokuwiki/conf/userstyle.css

Copy the following
  .dokuwiki div.page {
  	box-shadow: none;
  }
  .dokuwiki .pageId span {
  	box-shadow: none;
  }
  pre {
  	box-shadow: none;
  }