hedgedoc: Enable named pads

This allows the pads to be named nicely instead of having just a random string as URL.

For example the draft of the monthly report in july could be located at "https://md.archlinux.org/2023-07_monthly-report" instead of "https://md.archlinux.org/UF9Y235qTRe8XS3qxUVeJA".

https://docs.hedgedoc.org/references/url-scheme/#freeurl-mode



Signed-off-by: Christian Heusel <christian@heusel.eu>

roles/hedgedoc/templates/hedgedoc.service.d.j2

@@ -14,3 +14,5 @@ Environment=CMD_OAUTH2_PROVIDERNAME=Keycloak
 Environment=CMD_DOMAIN=md.archlinux.org
 Environment=CMD_PROTOCOL_USESSL=true
 Environment=CMD_URL_ADDPORT=false
+Environment=CMD_ALLOW_FREEURL=true
+Environment=CMD_REQUIRE_FREEURL_AUTHENTICATION=true