better dimensions check

Dockerfile

@@ -11,3 +11,4 @@ COPY . .
 
 EXPOSE 3000
 ENTRYPOINT ["node", "./src/index.js"]
+

src/controllers/user.js

@@ -1,5 +1,3 @@
-
-
 import bcrypt from 'bcrypt';
 import jwt from 'jsonwebtoken';
 import path from 'path';
@@ -85,7 +83,9 @@ class UserController {
         }
 
         const image = await Jimp.read(tempPath);
-        if (image.bitmap.width != 64 || image.bitmap.height != 64) {
+	const allowedWidths = [32, 64, 128];
+	const allowedHeights = [32, 64];
+        if (!allowedWidths.includes(image.bitmap.width) || !allowedHeights.includes(image.bitmap.height)) {
             return res.status(400).send('This does not look like a minecraft skin.');
         }
 		try {