Заменил используемую СУБД Postgres на MySQL

https://spring.io/guides/gs/accessing-data-mysql

compose.yml

@@ -1,10 +1,11 @@
 services:
-  postgres:
-    restart: on-failure
-    image: postgres:13
-    ports:
-      - "5454:5432"
+  mysql:
+    image: 'mysql:latest'
     environment:
-      POSTGRES_USER: user
-      POSTGRES_PASSWORD: 123456
-      POSTGRES_DB: sweater_db
+      - 'MYSQL_DATABASE=sweater_db'
+      - 'MYSQL_PASSWORD=123456'
+      - 'MYSQL_ROOT_PASSWORD=verysecret'
+      - 'MYSQL_USER=user'
+    ports:
+      - '3306'
+

pom.xml

@@ -26,12 +26,10 @@
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-mustache</artifactId>
         </dependency>
-
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
         </dependency>
-
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-devtools</artifactId>
@@ -43,7 +41,6 @@
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
         </dependency>
-
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-data-jpa</artifactId>
@@ -55,8 +52,8 @@
             <optional>true</optional>
         </dependency>
         <dependency>
-            <groupId>org.postgresql</groupId>
-            <artifactId>postgresql</artifactId>
+            <groupId>com.mysql</groupId>
+            <artifactId>mysql-connector-j</artifactId>
             <scope>runtime</scope>
         </dependency>
     </dependencies>
@@ -69,5 +66,4 @@
             </plugin>
         </plugins>
     </build>
-
 </project>

src/main/resources/application.properties

@@ -1,6 +1,6 @@
-spring.jpa.hibernate.ddl-auto = update
-spring.datasource.url=jdbc:postgresql://localhost:5454/sweater_db
+spring.jpa.hibernate.ddl-auto=update
+spring.datasource.url=jdbc:mysql://${MYSQL_HOST:localhost}:3306/sweater_db
 spring.datasource.username=user
 spring.datasource.password=123456
-spring.datasource.driver-class-name=org.postgresql.Driver
-spring.jpa.show-sql: true
+spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
+