Add support for docker & docker compose

docker/mqtt.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+echo "Waiting for mysql"
+/wait || exit 111
+
+echo "Running migrations"
+npx prisma migrate dev
+
+echo "Starting mqtt listener"
+exec node src/mqtt.js ${MESHMAP_MQTT_OPTS}