Update README.md

Author: j5ik2o

README.md

@@ -28,6 +28,7 @@ libraryDependencies += Seq(
   "com.github.j5ik2o" %% "docker-controller-scala-localstack" % version, // optional
   "com.github.j5ik2o" %% "docker-controller-scala-redis" % version, // optional
   "com.github.j5ik2o" %% "docker-controller-scala-elasticmq" % version, // optional
+  "com.github.j5ik2o" %% "docker-controller-scala-postgresql" % version, // optional
 )
 ```
 
@@ -57,7 +58,7 @@ The `DockerController` for the corresponding preset is as follows. Please see th
 - [LocalStackController](docker-controller-scala-localstack/src/main/scala/com/github/j5ik2o/dockerController/localstack/LocalStackController.scala) / [LocalStackControllerSpec](docker-controller-scala-localstack/src/test/scala/com/github/j5ik2o/dockerController/localstack/LocalStackControllerSpec.scala)
 - [RedisController](docker-controller-scala-redis/src/main/scala/com/github/j5ik2o/dockerController/redis/RedisController.scala) / [RedisControllerSpec](docker-controller-scala-redis/src/test/scala/com/github/j5ik2o/dockerController/redis/RedisControllerSpec.scala)
 - [ElasticMQController](docker-controller-scala-elasticmq/src/main/scala/com/github/j5ik2o/dockerController/elasticmq/ElasticMQController.scala) / [ElasticMQControllerSpec](docker-controller-scala-elasticmq/src/test/scala/com/github/j5ik2o/dockerController/elasticmq/ElasticMQControllerSpec.scala)
-
+- [PostgreSQLController](docker-controller-scala-postgresql/src/main/scala/com/github/j5ik2o/dockerController/postgresql/PostgreSQLController.scala) / [PostgreSQLControllerSpec](docker-controller-scala-postgresql/src/test/scala/com/github/j5ik2o/dockerController/postgresql/PostgreSQLControllerSpec.scala)
 
 ```scala
 class MySQLControllerSpec extends AnyFreeSpec with DockerControllerSpecSupport {