message: docs(README): Add documentation for rpm packages.
diff: @@ -67,6 +67,39 @@ sudo apt-get remove etcher-electron
  sudo rm /etc/apt/sources.list.d/etcher.list
  sudo apt-get update
  ```
  +#### Redhat (RHEL) and Fedora based Package Repository (GNU/Linux x86/x64)
  +
  +1. Add Etcher rpm repository:
  +
  + ```sh
  + sudo wget https://bintray.com/resin-io/redhat/rpm -O /etc/yum.repos.d/bintray-resin-io-redhat.repo
  + ```
  +
  +2. Update and install:
  +
  + ```sh
  + sudo yum install -y etcher-electron
  + ```
  + or
  + ```sh
  + sudo dnf install -y etcher-electron
  + ```
  +
  +##### Uninstall
  +
  +```
  +sudo yum remove -y etcher-electron
  +sudo rm /etc/yum.repos.d/bintray-resin-io-redhat.repo
  +sudo yum clean all
  +sudo yum makecache fast
  +```
  +or
  +```
  +sudo dnf remove -y etcher-electron
  +sudo rm /etc/yum.repos.d/bintray-resin-io-redhat.repo
  +sudo dnf clean all
  +sudo dnf makecache
  +```
  #### Brew Cask (macOS)
  