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go - Golang - Add int to end of byte array

I am trying to add an int to the end of a byte array in Golang.
This is my current code:

nameLengthBytes := []byte{32, 32}
nameLength := len(name)

The nameLengthBytes creates 2 spaces, and what I'm looking for is a way to add the nameLength to the end of the nameLengthBytes.

Examples:
if name length is 7, I want the array to be: {32, 55}
If name length is 12, I want the array to be {49, 50}

The problem is that sometimes the name is shorter than 10 so I need to fill up with a leading zero.

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