Make migrations optional.

laravel/migrate.runit

@@ -2,6 +2,8 @@
 rm -f /var/lock/laravel_migration_underway \
       /var/lock/laravel_migration_complete
 
+if [ "${MIGRATE_ENABLE,,}" = "on" ]; then
+
   # Give a moment for services to wake up
   echo "[MIGRATION] Waiting until Laravel Ready."
   sleep 3
@@ -32,6 +34,10 @@ rm /var/lock/laravel_migration_underway
   touch /var/lock/laravel_migration_complete
   echo "[MIGRATION] Migration complete!";
 
+else
+  echo "[MIGRATION] Not enabled. Set MIGRATE_ENABLE = on to enable."
+fi
+
 # Sleep forever (and sleep again in case the sleep process is killed)
 while true; do
   sleep infinity