Pleroma.MIME: use gen_magic

docs/installation/alpine_linux_en.md

@@ -13,6 +13,7 @@ It assumes that you have administrative rights, either as root or a user with [s
 * `erlang-parsetools`
 * `erlang-xmerl`
 * `git`
+* `file-dev`
 * Development Tools
 
 #### Optional packages used in this guide

docs/installation/arch_linux_en.md

@@ -9,6 +9,7 @@ This guide will assume that you have administrative rights, either as root or a
 * `elixir`
 * `git`
 * `base-devel`
+* `file`
 
 #### Optional packages used in this guide
 

docs/installation/debian_based_en.md

@@ -10,6 +10,7 @@ This guide will assume you are on Debian Stretch. This guide should also work wi
 * `elixir` (1.8+, Follow the guide to install from the Erlang Solutions repo or use [asdf](https://github.com/asdf-vm/asdf) as the pleroma user)
 * `erlang-dev`
 * `erlang-nox`
+* `libmagic-dev`
 * `git`
 * `build-essential`
 

docs/installation/gentoo_en.md

@@ -28,6 +28,7 @@ Gentoo quite pointedly does not come with a cron daemon installed, and as such i
 * `dev-db/postgresql`
 * `dev-lang/elixir`
 * `dev-vcs/git`
+* `sys-apps/file`
 
 #### Optional ebuilds used in this guide
 

docs/installation/otp_en.md

@@ -27,15 +27,16 @@ Other than things bundled in the OTP release Pleroma depends on:
 * PostgreSQL (also utilizes extensions in postgresql-contrib)
 * nginx (could be swapped with another reverse proxy but this guide covers only it)
 * certbot (for Let's Encrypt certificates, could be swapped with another ACME client, but this guide covers only it)
+* libmagic/file
 
 ```sh tab="Alpine"
 echo "http://nl.alpinelinux.org/alpine/latest-stable/community" >> /etc/apk/repositories
 apk update
-apk add curl unzip ncurses postgresql postgresql-contrib nginx certbot
+apk add curl unzip ncurses postgresql postgresql-contrib nginx certbot libmagic
 ```
 
 ```sh tab="Debian/Ubuntu"
-apt install curl unzip libncurses5 postgresql postgresql-contrib nginx certbot
+apt install curl unzip libncurses5 postgresql postgresql-contrib nginx certbot libmagic
 ```
 
 ## Setup