How to auto select MySQL database on Docker start?

We are currently trying to find a more efficient way to deal with MySQL docker start up process and currently have the following:

FROM mysql

ENV MYSQL_DATABASE marsdb

COPY ./src/main/resources/ /docker-entrypoint-initdb.d/

and

echo "Building database image..."
docker build -t marsdb -f Dockerfile.marsdb .

echo "Starting database and removing old database container."
docker rm -f marssql
docker run -d -p 3306:3306 --name marssql -e MYSQL_ROOT_PASSWORD=pass marsdb

The issue with this setup is the following: Once the container is started someone would currently have to manually go into the container and select the database, in this case marsdb like the following:

docker exec -it marssql bin/bash
mysql -u root -p
pass
use marsdb;

Is there a way to auto select the database after the container launches?

Source: StackOverflow