Another attempt at fixing the Embedded DB Docker image (#388)

build/mariadb.sh

@@ -1,16 +1,16 @@
-#!/bin/bash
+#!/bin/sh
 
 # start the database server without network or grant tables
 /usr/sbin/mariadbd --datadir=/var/lib/mysql  --skip-grant-tables --skip-networking &
 
 # wait for the server to start
-sleep 2
+sleep 5
 
 # change the root password
 mariadb -u root -e "FLUSH PRIVILEGES; ALTER USER 'root'@'localhost' IDENTIFIED BY '$MARIADB_ROOT_PASSWORD'; FLUSH PRIVILEGES;"
 
 # stop the server
-sleep 1
+sleep 5
 killall mariadbd
 
 # start the server normally