api dockerfile replaced mysql-client by mariadb-client

Docker/api/Dockerfile

@@ -5,7 +5,7 @@ RUN apt-get update && apt-get install -y \
 		libjpeg62-turbo-dev \
     libmcrypt-dev \
 		libpng-dev \
-		mysql-client \
+		mariadb-client \
     zip \
     libzip-dev && \
 		# docker-php-ext-install -j$(nproc) iconv && \