Dependencies RHEL8 (#4337)

* Add guide for RHEL 8

* Remove hash comments in shell scripts to avoid root prompt confusion

support/doc/dependencies.md

@@ -13,6 +13,7 @@ _note_: only **LTS** versions of external dependencies are supported. If no LTS
 - [CentOS 7](#centos-7)
 - [CentOS 8](#centos-8)
 - [Fedora](#fedora)
+- [RHEL 8](#red-hat-enterprise-linux-8)
 - [FreeBSD](#freebsd)
 - [macOS](#macos)
 - [Gentoo](#gentoo)
@@ -268,14 +269,21 @@ sudo systemctl start redis.service
 
 By default, you cannot access your server via public IP. To do so, you must configure firewall:
 
+-  Ports used by peertube dev setup:
 ```
-# Ports used by peertube dev setup
 sudo firewall-cmd --permanent --zone=public --add-port=3000/tcp
 sudo firewall-cmd --permanent --zone=public --add-port=9000/tcp
-# Optional
+```
+- Optional
+
+```
 sudo firewall-cmd --permanent --zone=public --add-service=http
 sudo firewall-cmd --permanent --zone=public --add-service=https
-# Reload firewall
+```
+
+- Reload firewall
+
+```
 sudo firewall-cmd --reload
 ```
 
@@ -289,6 +297,121 @@ echo fs.inotify.max_user_watches=582222 | sudo tee -a /etc/sysctl.conf && sudo s
 
 [More info](https://stackoverflow.com/questions/34662574/node-js-getting-error-nodemon-internal-watch-failed-watch-enospc#34664097)
 
+## Red Hat Enterprise Linux 8
+
+1. Register system as root user to Red Hat Subscription Management (create a free Red Hat account if you don't have one yet).
+
+```
+# subscription-manager register --username <username> --password <password> --auto-attach
+# dnf upgrade
+# reboot
+```
+
+2. Install Node.JS
+
+```
+sudo dnf module install nodejs:12
+```
+
+3. Install Yarn
+
+```
+curl --silent --location https://dl.yarnpkg.com/rpm/yarn.repo | sudo tee /etc/yum.repos.d/yarn.repo
+sudo dnf install yarn
+```
+
+4. Install FFmpeg
+
+```
+sudo subscription-manager repos --enable "codeready-builder-for-rhel-8-$(arch)-rpms"
+sudo dnf install --nogpgcheck https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm
+sudo dnf install --nogpgcheck https://mirrors.rpmfusion.org/free/el/rpmfusion-free-release-8.noarch.rpm
+sudo dnf upgrade
+sudo dnf install ffmpeg
+```
+
+5. Run:
+
+```
+sudo dnf install nginx postgresql postgresql-server postgresql-contrib openssl gcc-c++ make wget redis git
+```
+
+6. You'll need a symlink for python3 to python for youtube-dl to work
+
+```
+sudo ln -s /usr/bin/python3 /usr/bin/python
+```
+
+7. Initialize the PostgreSQL database:
+
+```
+sudo PGSETUP_INITDB_OPTIONS='--auth-host=md5' postgresql-setup --initdb --unit postgresql
+```
+
+Now that dependencies are installed, before running PeerTube you should enable and start PostgreSQL and Redis:
+
+```
+sudo systemctl enable --now redis
+sudo systemctl enable --now postgresql
+```
+
+If you are running the production guide, you also need to slightly pre-configure nginx, because nginx is packaged differently in the Red Hat family distributions:
+
+8. Configure nginx
+
+```
+sudo mkdir /etc/nginx/sites-available
+sudo mkdir /etc/nginx/sites-enabled
+sudo ln -s /etc/nginx/sites-enabled/peertube /etc/nginx/conf.d/peertube.conf
+sudo systemctl enable --now nginx
+```
+
+9. Prepare directory
+
+To add the 'peertube' user, you first have to create the 'www' folder and once the 'peertube' user is added, you have to set the access permissions.
+
+```
+sudo mkdir /var/www
+
+sudo useradd -m -d /var/www/peertube -s /bin/bash -p peertube peertube
+sudo passwd peertube
+
+sudo chmod 755 /var/www/peertube/
+```
+
+10. Firewall
+
+By default, you cannot access your server via public IP. To do so, you must configure firewall:
+
+-  Ports used by peertube dev setup:
+```
+sudo firewall-cmd --permanent --zone=public --add-port=3000/tcp
+sudo firewall-cmd --permanent --zone=public --add-port=9000/tcp
+```
+- Optional
+
+```
+sudo firewall-cmd --permanent --zone=public --add-service=http
+sudo firewall-cmd --permanent --zone=public --add-service=https
+```
+
+- Reload firewall
+
+```
+sudo firewall-cmd --reload
+```
+
+11. Configure max ports
+
+This is necessary if you are running dev setup, otherwise you will have errors with `nodemon`
+
+```
+echo fs.inotify.max_user_watches=582222 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p
+```
+
+[More info](https://stackoverflow.com/questions/34662574/node-js-getting-error-nodemon-internal-watch-failed-watch-enospc#34664097)
+
+
 ## FreeBSD
 
 On a fresh install of [FreeBSD](https://www.freebsd.org), new system or new jail: