Fixed docker as daemon

Author: grimzy

Makefile

@@ -5,7 +5,7 @@ mDB_DIR=$(shell pwd)/_db-$(mV)
 
 start_db:
 	@echo Starting MySQL $(V)
-	docker run --rm --name spatial-mysql \
+	docker run --rm -d --name spatial-mysql \
             -p 3306:3306 \
             -v $(DB_DIR):/var/lib/mysql \
             -e MYSQL_DATABASE=spatial_test \