Mount data files of database to local

.gitignore

@@ -19,3 +19,7 @@
 
 # Go workspace file
 go.work
+
+# Database file
+*.db
+.data/

create-todolist-mysql.sh

@@ -0,0 +1,30 @@
+#!/usr/bin/env sh
+
+set -eux
+
+# Launch a MySQL container and expose the port 3306 to the localhost.
+# A `todolist` database is created in the MySQL container if it does not exist.
+
+IMAGE_NAME=mysql
+CONTAINER_NAME=todolist-mysql
+DATA_DIR=$PWD/.data
+PORT=3306
+MYSQL_ROOT_PASSWORD=root
+
+# If the .data directory does not exist, create it.
+if [ ! -d .data ]; then
+	mkdir .data
+fi
+# If the container does not exist, create it.
+if ! docker ps -a | grep $CONTAINER_NAME; then
+	docker run \
+		-dp $PORT:3306 \
+		-v "$DATA_DIR":/var/lib/mysql \
+		--name "$CONTAINER_NAME" \
+		-e MYSQL_ROOT_PASSWORD="$MYSQL_ROOT_PASSWORD" \
+		"$IMAGE_NAME"
+fi
+# If the `todolist` database does not exist, create it.
+docker exec -it "$CONTAINER_NAME" \
+	mysql -uroot -p$MYSQL_ROOT_PASSWORD \
+	-e "CREATE DATABASE todolist;"