database container ref updated

src/main/resources/db-config.properties

@@ -14,7 +14,7 @@ spring.jpa.properties.hibernate.query.plan_cache_max_size= 1024
 spring.jpa.properties.hibernate.query.plan_parameter_metadata_max_size= 32
 spring.jpa.show-sql: true
 # Connection properties
-spring.datasource.url= jdbc:mysql://db:3306/playground?autoReconnect=true&useSSL=false
+spring.datasource.url= jdbc:mysql://hdfcproject-db:3306/playground?autoReconnect=true&useSSL=false
 spring.datasource.username= playground
 spring.datasource.password= password
 # Keep the connection alive if idle for a long time (needed in production)