fix webhook validation and change readme

README.md

@@ -6,6 +6,10 @@ this was just made to remember whatever goofy things we did in a minecraft serve
 
 or, you know, notify us when the server starts (but not ends)
 
+# Prerequisites
+Before using this plugin, you must:
+* Get Spigot
+* Get a JAR file from [the releases](https://git.sob.moe/sobrooms/notify-on-start/releases) or [Google Drive](https://drive.google.com/drive/folders/11wMPjOh2b8oRzpeJOrOI4ZAkImOlr93u?usp=sharing) (the drive folder is frequently updated)
 # making webhooks
 If you already know how, you can skip this step.
 
@@ -22,7 +26,8 @@ To make a webhook:
 
 
 # using this thing
-You must get Spigot.\
+Of course, you must get a release first, as said in the prerequisites. After you get a jar, put it in the `plugins` folder
+
 On first run, it will make a directory where Spigot is.\
 These files will be `NoS/notifyWebhook.json` and `NoS/pubMessageWebhook.json`.