Make README more useable

and copy&paste-able :)

Adapted from this original PR:

#12

Co-authored-by: Viktor Szépe <[email protected]>

README.md

@@ -6,9 +6,9 @@ This shell script will export all of your Shortcut organization data to JSON fil
 
 You'll need a Shortcut API token defined as an environment variable (see below). If you don't have a token already, you can create one by navigating to Settings > My Account > API Tokens.
 
-```sh
-$ export SHORTCUT_API_TOKEN="YOUR API TOKEN HERE"
-$ ./exporter.sh
+```shell
+curl -o "exporter.sh" "https://github.com/useshortcut/exporter/raw/main/exporter.sh"
+SHORTCUT_API_TOKEN="YOUR API TOKEN HERE" ./exporter.sh
 ```
 
 ## Development