Adds JWT secret, turns on Swagger UI, and cleans up refresh token response

src/main/resources/application.properties

@@ -4,10 +4,15 @@ spring.jpa.hibernate.ddl-auto=update
 
 spring.jpa.properties.hibernate.type.preferred_uuid_jdbc_type=CHAR
 
-spring.datasource.driverClassName=com.mysql.cj.jdbc.Driver
+spring.datasource.driverClassName=org.mariadb.jdbc.Driver
 spring.datasource.url=${DB_URL}
 spring.datasource.username=${DB_USER}
 spring.datasource.password=${DB_PASSWORD}
 
 jwt.secret=${JWT_SECRET}
-jwt.expiration=30000
+jwt.expiration=300000
+
+springdoc.api-docs.enabled=true
+springdoc.api-docs.path=/docs/api-docs
+springdoc.swagger-ui.enabled=true
+springdoc.swagger-ui.path=/docs/swagger-ui.html