switch to in memory db

Dockerfile

@@ -1,4 +1,5 @@
 FROM openjdk:17-jdk-slim
 WORKDIR /app
 COPY target/lab-crud-0.0.1-SNAPSHOT.jar lab-crud.jar
+EXPOSE 8080
 CMD ["java", "-jar", "lab-crud.jar"]

pom.xml

@@ -44,15 +44,16 @@
             <artifactId>lombok</artifactId>
             <optional>true</optional>
         </dependency>
-        <dependency>
-            <groupId>com.mysql</groupId>
-            <artifactId>mysql-connector-j</artifactId>
-        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>com.h2database</groupId>
+            <artifactId>h2</artifactId>
+            <scope>runtime</scope>
+        </dependency>
     </dependencies>
 
     <build>

src/main/resources/application.properties

@@ -1,9 +1,8 @@
 spring.application.name=lab-crud
-spring.datasource.url=jdbc:mysql://${DB_HOST:localhost}:3306/${DB_NAME:labcrud}
-spring.datasource.username=${DB_USER:root}
+spring.datasource.url=jdbc:h2:mem:${DB_NAME:labcrud}
+spring.datasource.username=${DB_USER:sa}
 spring.datasource.password=${DB_PASSWORD:password}
-spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
+spring.datasource.driver-class-name=org.h2.Driver
 spring.jpa.hibernate.ddl-auto=update
 spring.jpa.show-sql=true
-spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL8Dialect
 spring.config.import=optional:file:.env