Merge branch '234-fix-error-500-from-api-fridges-waste-product-116' into 'main'

A temporal fix was added for add product endpoint

Closes #234

See merge request idatt2106-v23-03/backend!177

src/main/java/ntnu/idatt2016/v233/SmartMat/controller/product/ProductController.java

@@ -63,12 +63,17 @@ public class ProductController {
         Optional<List<String>> volumeUnit = productService.getProductVolume(productRequest.ean());
 
         if(volumeUnit.isPresent()){
+            if(volumeUnit.get().size() > 1){
                 product.setUnit(volumeUnit.get().get(1));
                 product.setAmount(Double.parseDouble(volumeUnit.get().get(0)));
             }else {
                 product.setUnit("STK");
                 product.setAmount(1.0);
             }
+        }else {
+            product.setUnit("STK");
+            product.setAmount(1.0);
+        }
 
         if(productRequest.allergies() != null){
             productRequest.allergies().forEach(allergyName-> product.addAllergy(allergyService.getAllergyByName(allergyName).get()));