Update MariaDB recipe for Timeout

[phxism]

Question description
fiber seems not support cancelContext like net/http, for demo case, see context
So code in the sub project "docker-mariadb-clean-arch"

customContext, cancel := context.WithCancel(context.Background())
	defer cancel()

should be change into

customContext, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

I am a green hand for golang and fiber, so i'm not sure that if i am right.

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