Add the obsidian link support to config also. Fix poll-for-db.

script/poll-for-db

@@ -1,10 +1,12 @@
 #!/bin/bash
 
+echo "==> Polling DB…"
+
 appdir=$(cd $(dirname "$0")/.. && pwd)
 [ -f /etc/app-env ] || exec "$appdir/script/docker-environment" $0 $@
 
 for i in {1..60}; do
-  curl -sf telnet://db:3306 >/dev/null && exit
+  nc -z -w5 db 3306 && exit
   sleep 1
 done