Pull request 1919: rm-ports

Squashed commit of the following:

commit 892cb403112f8b816d99e645d7419bfd49ad3c33
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Wed Jul 12 17:30:28 2023 +0300

    docker: rm 784, 8853 ports

CHANGELOG.md

@@ -23,6 +23,11 @@ See also the [v0.107.35 GitHub milestone][ms-v0.107.35].
 NOTE: Add new changes BELOW THIS COMMENT.
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+### Removed
+
+- Default exposure of the non-standard ports 784 and 8853 for DNS-over-QUIC in
+  the `Dockerfile`.
+
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 NOTE: Add new changes ABOVE THIS COMMENT.
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