Added checks and readme.md

package.json

@@ -4,7 +4,7 @@
   "description": "Vara Network token list",
   "main": "scripts/verifier.js",
   "scripts": {
-    "start": "node scripts/verifier.js"
+    "check": "node scripts/verifier.js"
   },
   "keywords": [
     "vara network",
@@ -15,6 +15,7 @@
   "license": "MIT",
   "dependencies": {
     "ajv": "^8.17.1",
-    "ajv-formats": "^3.0.1"
+    "ajv-formats": "^3.0.1",
+    "image-size": "^1.1.1"
   }
 }