Update docs

defaults/main.yml

@@ -12,9 +12,12 @@ mastodon_docker_enable_elasticsearch: false
 mastodon_docker_mastodon_secret: undefined # can be generated with a password manager
 mastodon_docker_vapid_public: undefined # generate with npx web-push generate-vapid-keys
 mastodon_docker_vapid_private: undefined # generate with npx web-push generate-vapid-keys
-mastodon_docker_ar_encryption_deterministic_key: undefined # generate with openssl rand -hex 32
-mastodon_docker_ar_encryption_derivation_salt: undefined # generate with openssl rand -hex 32
-mastodon_docker_ar_encryption_primary_key: undefined # generate with openssl rand -hex 32
+
+# generate with docker run --rm -it --entrypoint /bin/bash lscr.io/linuxserver/mastodon:latest generate-active-record
+mastodon_docker_ar_encryption_deterministic_key: undefined
+mastodon_docker_ar_encryption_derivation_salt: undefined
+mastodon_docker_ar_encryption_primary_key: undefined
+
 mastodon_docker_smtp:
   server: example.com
   port: 587