optimize devcontainer.json, optimize imports in machinecontroller

.devcontainer/devcontainer.json

@@ -1,36 +1,35 @@
 // For format details, see https://aka.ms/devcontainer.json. For config options, see the
 // README at: https://github.com/devcontainers/templates/tree/main/src/java
 {
-	"name": "Aries-Backend DevContainer File for quick dev env setup",
-	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
-	"image": "mcr.microsoft.com/devcontainers/java:0-17",
-
-	"features": {
-		"ghcr.io/devcontainers/features/java:1": {
-			"version": "none",
-			"installMaven": "false",
-			"mavenVersion": "3.6.1",
-			"installGradle": "true", 
-      			"gradleVersion": "7.6.1"
-		}
-	},
-
-	// Configure tool-specific properties.
-	"customizations": {
-		// Configure properties specific to VS Code.
-		"vscode": {
-			"settings": {},
-			"extensions": [
-				"streetsidesoftware.code-spell-checker"
-			]
-		}
-	},
-
-	// Use 'forwardPorts' to make a list of ports inside the container available locally.
-	"forwardPorts": [
-   		 8080,
-    		 5432
- 	 ]
-	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
-	// "remoteUser": "root"
+  "name": "Aries-Backend DevContainer File for quick dev env setup",
+  // Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
+  "image": "mcr.microsoft.com/devcontainers/java:0-17",
+  "features": {
+    "ghcr.io/devcontainers/features/java:1": {
+      "version": "none",
+      "installGradle": "true",
+    },
+    "ghcr.io/devcontainers/features/docker-in-docker:2": {
+      "dockerDashComposeVersion": "v2",
+      "installDockerBuildx": true,
+      "moby": false
+    }
+  },
+  // Configure tool-specific properties.
+  "customizations": {
+    // Configure properties specific to VS Code.
+    "vscode": {
+      "settings": {},
+      "extensions": [
+        "streetsidesoftware.code-spell-checker"
+      ]
+    }
+  },
+  // Use 'forwardPorts' to make a list of ports inside the container available locally.
+  "forwardPorts": [
+    8080,
+    5432
+  ]
+  // Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+  // "remoteUser": "root"
 }

src/main/kotlin/tech/niklas/ariesbackend/web/MachineController.kt

@@ -1,14 +1,10 @@
 package tech.niklas.ariesbackend.web
 
-import org.springframework.data.crossstore.ChangeSetPersister.NotFoundException
-import org.springframework.http.HttpStatus
 import org.springframework.web.bind.annotation.*
-import org.springframework.web.server.ResponseStatusException
 import tech.niklas.ariesbackend.db.DockerMachineRepository
 import tech.niklas.ariesbackend.exception.MachineAlreadyExistsException
 import tech.niklas.ariesbackend.model.DockerMachine
 import kotlin.jvm.optionals.getOrElse
-import kotlin.jvm.optionals.getOrNull
 
 @RestController
 @RequestMapping("/machine")