Update README.md

Author: GuiMar10

src/components/easels/README.md

@@ -3,9 +3,12 @@
 Hey there! This is a very early version of Easels, so a lot of features are missing.
 
 It uses SvelteJS, build it using:
-´´´
+
+```
+npm install
 npm run build
-´´´
+```
+if you see an error while running the local build, that's because Firefox blocks inline javascript, so put all your code on a separate file;
 
 This is meant to run locally on the browser, built into the ArcFox Extension
 Feel free to contribute by making changes or adding features!