docs: download tarball using powershell commands

README.md

@@ -7,13 +7,18 @@ This is a WSL Distro for Ruby'n'Rails (Ruby and RubyOnRails) development. It is
 * [RubyOnRails](https://rubyonrails.org/)
 
 ## Copy & Paste setup
+
+
 ```
 # Install WSL2
 wsl --install
-# Build the WSL-Distro Tarball
-docker build -o type=tar,dest=rubynrails.tar .
+# Download the WSL-Distro Tarball
+$version = [io.path]::GetFileName((Invoke-WebRequest "https://github.com/salzig/wsl-distro-rubynrails/releases/latest" -MaximumRedirection 0 -ErrorAction Ignore).Headers.Location)
+(New-Object System.Net.WebClient).DownloadFile("https://github.com/salzig/wsl-distro-rubynrails/releases/download/$version/wsl-distro-rubynrails.tar", "wsl-distro-rubynrails.tar")
 # Import Tarball as WSL-Distro
-wsl --import RubynRails C:\WSL\rubynrails .\rubynrails.tar
+wsl --import RubynRails .\rubynrails wsl-distro-rubynrails.tar
+# Cleanup temporary file
+Remove-Item "wsl-distro-rubynrails.tar"
 ```
 
 Default user is `me` with a password of `love`, which you need to run commands as root (using sudo).