404 Error for new dynamic page with getStaticPaths in production

Question

I've created an app with Next.js and I'm using getStaticPaths and getStaticProps in order to create dynamic post page. When I'm in development, I can create a new post and the page to see it is created as well, but when I do that in production (with Vercel), the page cannot be found (404 error) until I build the app again.

What can I do to have the created page right after the creation in production like I have in development without building the app again?

Here's my code:

/[postID].jsx

const Post = ({ post }) => {
  return (
    <Section>
        <SinglePost post={post} />
    </Section>
  );
};

export async function getStaticPaths() {
  let paths = [];
  try {
    const uri = `${URL}/api/posts/`;
    const res = await fetch(uri);
    const posts = await res.json();
    paths = posts.map((post) => ({
      params: { postId: post._id },
    }));
  } catch (err) {
    console.log(`Error fetching ressources: `, err);
  }
  return { paths, fallback: false };
}

export const getStaticProps = async ({ params }) => {
  const uri = `${URL}/api/posts/${params.postId}`;
  const res = await fetch(uri);
  const post = await res.json();
  return { props: { post } };
};

export default Post;