Make sure the MySQL jdbc driver is included

Add additional settings for the initial directory also works
and does not error with `./gradlw test` or `./gradlew bootRun`.

complete/build.gradle

@@ -15,6 +15,7 @@ repositories {
 dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
 	implementation 'org.springframework.boot:spring-boot-starter-web'
+    runtimeOnly 'com.mysql:mysql-connector-j'
 	testImplementation 'org.springframework.boot:spring-boot-starter-test'
 }
 

initial/build.gradle

@@ -15,6 +15,7 @@ repositories {
 dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
 	implementation 'org.springframework.boot:spring-boot-starter-web'
+    runtimeOnly 'com.mysql:mysql-connector-j'
 	testImplementation 'org.springframework.boot:spring-boot-starter-test'
 }
 

initial/docker-compose.yml

@@ -0,0 +1,13 @@
+mysql:
+  image: mysql
+  ports:
+    - "3306:3306"
+  expose:
+    - "3306"
+  environment:
+    - MYSQL_USER=springuser
+    - MYSQL_PASSWORD=ThePassword
+    - MYSQL_DATABASE=db_example
+    - MYSQL_ROOT_PASSWORD=root
+  volumes:
+    - "./conf.d:/etc/mysql/conf.d:ro"

initial/src/main/resources/application.properties

@@ -2,3 +2,4 @@ spring.jpa.hibernate.ddl-auto=update
 spring.datasource.url=jdbc:mysql://${MYSQL_HOST:localhost}:3306/db_example
 spring.datasource.username=springuser
 spring.datasource.password=ThePassword
+spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver