Update img tags to NuxtImg

frontend/pages/article/[id].vue

@@ -28,7 +28,7 @@ if (response.isError) {
 <template>
     <div class="container">
         <div class="w-full h-[80svh] rounded-3xl relative overflow-hidden">
-            <img class="absolute object-cover size-full" :alt="article!.title" :src="article!.cover_image" />
+            <NuxtImg class="absolute object-cover size-full" :alt="article!.title" :src="article!.cover_image" />
             <div class="absolute bg-linear-to-t from-black/75 to-transparent size-full" />
             <div class="absolute pl-10 right-10 bottom-10 flex flex-col gap-6">
                 <h1 class="typo-h-4 text-white pl-8">
@@ -48,7 +48,7 @@ if (response.isError) {
                             class="w-fit pr-2 pl-5 h-[50px] rounded-full flex items-center justify-center gap-3 bg-white">
                             <div
                                 class="relative flex items-center justify-center rounded-full overflow-hidden size-[35px]">
-                                <img
+                                <NuxtImg
                                     class="size-full object-cover absolute"
                                     :src="article!.author.profile_photo"
                                     alt="article-author"

frontend/pages/cart/checkout.vue

@@ -76,7 +76,7 @@ const selectedGateway = ref<PaymentGateway>(paymentGateways.value[0]);
                     class="w-full p-5 border rounded-xl flex flex-col gap-4 transition-all cursor-pointer"
                 >
                     <div class="aspect-square flex-center">
-                        <img :src="gateway.picture" class="object-cover" />
+                        <NuxtImg :src="gateway.picture" class="object-cover" />
                     </div>
                     <span class="typo-label-sm text-black">
                         {{ gateway.title }}

frontend/pages/contact-us.vue

@@ -133,7 +133,7 @@ const contactWays = ref([
                 </div>
             </div>
             <div class="w-4/12 h-full bg-red-300">
-                <img src="/mlz.jpeg" class="-mt-16" />
+                <NuxtImg src="/mlz.jpeg" class="-mt-16" />
             </div>
         </div>
     </div>