Update docker stuff and bug fixes

docker-test/wait-for-pdns.sh

@@ -0,0 +1,22 @@
+#!/bin/sh
+
+set -e
+
+CMD="$1"
+shift
+CMD_ARGS="$@"
+
+LOOPS=10
+until curl -H "X-API-Key: ${PDNS_API_KEY}" "${PDNS_PROTO}://${PDNS_HOST}:${PDNS_PORT}/api/v1/servers"; do
+  >&2 echo "PDNS is unavailable - sleeping"
+  sleep 1
+  if [ $LOOPS -eq 10 ]
+  then
+    break
+  fi
+done
+
+sleep 5
+
+>&2 echo "PDNS is up - executing command"
+exec $CMD $CMD_ARGS