docs: add better examples to next/image docs.

docs/02-app/01-building-your-application/05-optimizing/01-images.mdx

@@ -233,9 +233,112 @@ Styling the Image component is similar to styling a normal `<img>` element, but
 - When using `fill`, the parent element must have `display: block`
   - This is the default for `<div>` elements but should be specified otherwise.
 
-For examples, see the [Image Component Demo](https://image-component.nextjs.gallery).
+## Examples
 
-### Examples
+### Responsive
+
+<Image
+  alt="Responsive image filling the width and height of its parent container"
+  srcLight="/docs/light/responsive-image.png"
+  srcDark="/docs/dark/responsive-image.png"
+  width="1600"
+  height="629"
+/>
+
+```jsx
+import Image from 'next/image'
+import mountains from '../public/mountains.jpg'
+
+export default function Responsive() {
+  return (
+    <div style={{ display: 'flex', flexDirection: 'column' }}>
+      <Image
+        alt="Mountains"
+        // Importing an image will
+        // automatically set the width and height
+        src={mountains}
+        sizes="100vw"
+        // Make the image display full width
+        style={{
+          width: '100%',
+          height: 'auto',
+        }}
+      />
+    </div>
+  )
+}
+```
+
+### Fill Container
+
+<Image
+  alt="Grid of images filling parent container width"
+  srcLight="/docs/light/fill-container.png"
+  srcDark="/docs/dark/fill-container.png"
+  width="1600"
+  height="529"
+/>
+
+```jsx
+import Image from 'next/image'
+import mountains from '../public/mountains.jpg'
+
+export default function Fill() {
+  return (
+    <div
+      style={{
+        display: 'grid',
+        gridGap: '8px',
+        gridTemplateColumns: 'repeat(auto-fit, minmax(400px, auto))',
+      }}
+    >
+      <div style={{ position: 'relative', height: '400px' }}>
+        <Image
+          alt="Mountains"
+          src={mountains}
+          fill
+          sizes="100vw"
+          style={{
+            objectFit: 'cover', // cover, contain, none
+          }}
+        />
+      </div>
+      {/* And more images in the grid... */}
+    </div>
+  )
+}
+```
+
+### Background Image
+
+<Image
+  alt="Background image taking full width and height of page"
+  srcLight="/docs/light/background-image.png"
+  srcDark="/docs/dark/background-image.png"
+  width="1600"
+  height="427"
+/>
+
+```jsx
+import Image from 'next/image'
+import mountains from '../public/mountains.jpg'
+
+export default function Background() {
+  return (
+    <Image
+      alt="Mountains"
+      src={mountains}
+      placeholder="blur"
+      quality={100}
+      fill
+      sizes="100vw"
+      style={{
+        objectFit: 'cover',
+      }}
+    />
+  )
+}
+```
 
 For examples of the Image component used with the various styles, see the [Image Component Demo](https://image-component.nextjs.gallery).