Add SECURITY.md

[akf]

Related to GSA/data.gov#4959

[github-actions]

OpenTofu plan for production

No changes. Your infrastructure matches the configuration.

No changes. Your infrastructure matches the configuration.

OpenTofu has compared your real infrastructure against your configuration and
found no differences, so no changes are needed.

✅ Plan applied in apply #125

Outputs

client_spaces = [
    "gsa-datagov/development",
    "gsa-datagov/management",
    "gsa-datagov/prod",
    "gsa-datagov/staging",
]
ds_record     = [
    "DS",
    "ssb.data.gov",
    "4862 13 2 F9C2CD8A4F6AF7EFE48A630EE4AD53431636310D1306A7608D27C7B011CA20B9",
]
instructions  = "Create NS and DS records in the .data.gov zone with the values indicated."
ns_record     = [
    "NS",
    "ssb.data.gov",
    <<-EOT
        [ "ns-1439.awsdns-51.org", 
        "ns-146.awsdns-18.com", 
        "ns-1688.awsdns-19.co.uk", 
        "ns-658.awsdns-18.net" ]
    EOT,
]