* Php module dependencies

It is not clear what are the exact php modules required for the site to run.  On a Trisquel 9 VM typically it is sufficient to have the following extra modules installed on top of a standard php 7 installation:

- php-gd
- php-mbstring
- php-mysql
- php-xml

Help with formalizing the module dependencies is appreciated.

* Staging deployment patch

When deploying to staging, run

#+begin_src sh
  patch -p2 <mark-staging.patch
#+end_src