Create SECURITY.md

[Lovebugpaulnice]

Explanation of the changes, problem that they are intended to fix.

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All Submissions:

• I have read the code of conduct.
• I am submitting to the correct base branch

Changes that modify the db structure

• Backwards compatibility: Users running the new code using an existing .disquetv folder will not lose their channels / settings.
• I've implemented the necessary db migration steps if any.

New features

• I understand that the feature may not be accepted if it doesn't fit the upstream app's planned design direction. But that in this case I am encouraged to share this as an available modification other users can use if they want.

[chrisbenincasa]

Hey thanks for the contribution. This looks like the default template as the versions don't match. Since we're pre-release I don't think we're quite ready for this anyway, but we will definitely look into adding this in the future!