Update Docker example to remove HOSTNAME (#54102)

With the latest changes in stable Next.js setting HOSTNAME is not longer required for the image to function correctly 👍 Fixes #54093
vercel · Aug 16, 2023 · d60690e · d60690e
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commit d60690e
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diff --git a/examples/with-docker/Dockerfile b/examples/with-docker/Dockerfile
@@ -55,6 +55,5 @@ USER nextjs
 EXPOSE 3000
 
 ENV PORT 3000
-ENV HOSTNAME localhost
 
 CMD ["node", "server.js"]