add nodes endpoint

- add NodesController
  - add NodesEndpoint
  - add NodesControllerTest
  - add NodesController
  - add nodes.http

- add NodeEntity toNodesResponse in Mapping.kt

- add getNodes to NodeService

- add findAll to NodeRepository

src/test-integration/kotlin/ltd/hlaeja/controller/NodesEndpoint.kt

@@ -0,0 +1,113 @@
+package ltd.hlaeja.controller
+
+import ltd.hlaeja.library.deviceRegistry.Nodes
+import ltd.hlaeja.test.container.PostgresTestContainer
+import org.assertj.core.api.Assertions.assertThat
+import org.assertj.core.api.SoftAssertions
+import org.assertj.core.api.junit.jupiter.InjectSoftAssertions
+import org.assertj.core.api.junit.jupiter.SoftAssertionsExtension
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.extension.ExtendWith
+import org.junit.jupiter.params.ParameterizedTest
+import org.junit.jupiter.params.provider.CsvSource
+import org.springframework.boot.test.context.SpringBootTest
+import org.springframework.boot.test.context.SpringBootTest.WebEnvironment.RANDOM_PORT
+import org.springframework.boot.test.web.server.LocalServerPort
+import org.springframework.test.web.reactive.server.WebTestClient
+import org.springframework.test.web.reactive.server.expectBody
+
+@PostgresTestContainer
+@SpringBootTest(webEnvironment = RANDOM_PORT)
+@ExtendWith(SoftAssertionsExtension::class)
+class NodesEndpoint {
+
+    @InjectSoftAssertions
+    lateinit var softly: SoftAssertions
+
+    @LocalServerPort
+    var port: Int = 0
+
+    lateinit var webClient: WebTestClient
+
+    @BeforeEach
+    fun setup() {
+        webClient = WebTestClient.bindToServer().baseUrl("http://localhost:$port").build()
+    }
+
+    @Test
+    fun `get nodes default - success`() {
+        // when
+        val result = webClient.get().uri("/nodes").exchange()
+
+        // then
+        result.expectStatus().isOk()
+            .expectBody<List<Nodes.Response>>()
+            .consumeWith {
+                assertThat(it.responseBody?.size).isEqualTo(3)
+            }
+    }
+
+    @ParameterizedTest
+    @CsvSource(
+        value = [
+            "1,3",
+            "2,0",
+        ],
+    )
+    fun `get nodes by page - success`(page: Int, expected: Int) {
+        // when
+        val result = webClient.get().uri("/nodes/page-$page").exchange()
+
+        // then
+        result.expectStatus().isOk()
+            .expectBody<List<Nodes.Response>>()
+            .consumeWith {
+                assertThat(it.responseBody?.size).isEqualTo(expected)
+            }
+    }
+
+    @Test
+    fun `get nodes by pages - fail`() {
+        // when
+        val result = webClient.get().uri("/nodes/page-0").exchange()
+
+        // then
+        result.expectStatus().isBadRequest
+    }
+
+    @ParameterizedTest
+    @CsvSource(
+        value = [
+            "1,2,2",
+            "2,2,1",
+            "3,2,0",
+        ],
+    )
+    fun `get nodes by page and show - success`(page: Int, show: Int, expected: Int) {
+        // when
+        val result = webClient.get().uri("/nodes/page-$page/show-$show").exchange()
+
+        // then
+        result.expectStatus().isOk()
+            .expectBody<List<Nodes.Response>>()
+            .consumeWith {
+                assertThat(it.responseBody?.size).isEqualTo(expected)
+            }
+    }
+
+    @ParameterizedTest
+    @CsvSource(
+        value = [
+            "0,1",
+            "1,0",
+        ],
+    )
+    fun `get nodes by page and show - fail`(page: Int, show: Int) {
+        // when
+        val result = webClient.get().uri("/nodes/page-$page/show-$show").exchange()
+
+        // then
+        result.expectStatus().isBadRequest
+    }
+}