[TASK] Integrate security.txt

.gitignore

@@ -9,6 +9,7 @@
 /public/services/api-keys.php
 !/public/humans.txt
 !/public/robots.txt
+!/public/security.txt
 !/public/services
 /auth.json
 /assets/

public/security.txt

+-----BEGIN PGP SIGNED MESSAGE-----
+Hash: SHA256
+
+# Please report vulnerabilities using the TYPO3 security team address
+Contact: mailto:security@typo3.org
+
+# OpenPGP key
+Encryption: https://typo3.org/fileadmin/t3o_common_storage/keys/B41CC3EF373E0F5C70187FE93BEFBD27C05FBE60.asc
+Encryption: https://keys.openpgp.org/vks/v1/by-fingerprint/B41CC3EF373E0F5C70187FE93BEFBD27C05FBE60
+Encryption: openpgp4fpr:B41CC3EF373E0F5C70187FE93BEFBD27C05FBE60
+
+# Preferred language when contacting us
+Preferred-Languages: en
+
+# Canonical URL
+Canonical: https://typo3.org/security.txt
+-----BEGIN PGP SIGNATURE-----
+
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+=7/kv
+-----END PGP SIGNATURE-----