enable email registration and set session secret for hedgedoc

manifests/hedgedoc/all.yaml

@@ -18,6 +18,9 @@ data:
   CMD_PROTOCOL_USESSL: "true"
   CMD_URL_ADDPORT: "false"
   CMD_ALLOW_ORIGIN: '["hedgedoc.t0rt1k.tech"]'
+  CMD_EMAIL: "true"
+  CMD_ALLOW_EMAIL_REGISTER: "true"
+  CMD_SESSION_SECRET: szMYcoyJoKavpbzwK6KvLyKYCBbT96FB4sA8ibDpDuo=
 ---
 kind: PersistentVolumeClaim
 apiVersion: v1