Write a quick doc with instructions for some dev release tasks

Description

Write a quick doc with instructions for:

1. Cutting release branches.
2. Putting the CI servers and translation server onto release branch.
3. Investigating build issues such as when an RC fails to build.
4. Updating servers to latest build / dot release version where needed.

QA Test Steps

None

Reporter

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Status

Mana

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Assignee

Carlos Panato

QA Assignee

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Reporter

Amy Blais

Epic Link

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Fix versions

Mattermost Team

Cloud

Sprint

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Labels

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QA Testing Areas

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GitHub Issue

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Components

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Configure