Update deployment documentation

[tonyyzy]

Since I had to go through a few hurdles to setup mdsrv with apache2 on my mac, I thought it would be useful to document the process and may contribute to a documentation update.

Setup on MacOS Mojave (10.14.6) with HomeBrew and conda on python3.6 (don't think 3.7 is supported yet? possibly due to async?)

• It is hopeless to install mod_wsgi on apple's apache. Need to install apache/httpd via brew
  https://tecadmin.net/install-apache-macos-homebrew/
  refer to the first bit for installation

• Under a conda environment, use pip to install mod_wsgi then mod_wsgi-express install-module. This command will print three lines to the terminal, copy the three lines to the end of the httpd.conf file, for apache to load mod_wsgi module. The location depends on where you installed httpd, likely to be /usr/local/etc/httpd

• Follow http://nglviewer.org/mdsrv/deployment.html to put the four files into the correct location (mdsrv.conf, mdsrv.html, mdsrv.wsgi, app.cfg).

• The mdsrv.conf needs a bit modification before operational:

  • Add a new section that directs to the /var/www/html directory

    DocumentRoot /var/www/html
    <Directory /var/www/html>
        Options Indexes FollowSymLinks
        AllowOverride All
        Require all granted
    </Directory>
    

  • For apache 2.4, the original apache.conf file's permission part needs to be replaces
    Replace

       Order deny,allow
       Allow from all
    

    with

       Require all granted