fix mysql error no access

mysql/Dockerfile

@@ -12,24 +12,8 @@ RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
 
 RUN chown -R mysql:root /var/lib/mysql/
 
-ADD startup /etc/mysql/startup
-
-ARG MYSQL_DATABASE=default
-ARG MYSQL_USER=default
-ARG MYSQL_PASSWORD=secret
-ARG MYSQL_ROOT_PASSWORD=root
-
-ENV MYSQL_DATABASE=$MYSQL_DATABASE
-ENV MYSQL_USER=$MYSQL_USER
-ENV MYSQL_PASSWORD=$MYSQL_PASSWORD
-ENV MYSQL_ROOT_PASSWORD=$MYSQL_ROOT_PASSWORD
-
-RUN sed -i 's/MYSQL_DATABASE/'$MYSQL_DATABASE'/g' /etc/mysql/startup && \
-    sed -i 's/MYSQL_USER/'$MYSQL_USER'/g' /etc/mysql/startup && \
-    sed -i 's/MYSQL_PASSWORD/'$MYSQL_PASSWORD'/g' /etc/mysql/startup
-
 ADD my.cnf /etc/mysql/conf.d/my.cnf
 
-CMD ["mysqld", "--init-file=/etc/mysql/startup"]
+CMD ["mysqld"]
 
 EXPOSE 3306

mysql/startup

@@ -1,3 +0,0 @@
-DROP USER MYSQL_USER;
-CREATE DATABASE IF NOT EXISTS MYSQL_DATABASE;
-GRANT ALL ON `MYSQL_DATABASE`.* TO 'MYSQL_USER'@'%' IDENTIFIED BY 'MYSQL_PASSWORD';