Update to use a better Java devcontainer.

.devcontainer/devcontainer.json

@@ -1,39 +1,28 @@
 {
 	"name": "Java",
-	"build": {
-		"dockerfile": "Dockerfile",
-		"args": {
-			// Update the VARIANT arg to pick a Java version >= 17
-			"VARIANT": "17",
-			// Options to install Maven or Gradle
-			"INSTALL_MAVEN": "true",
-			"MAVEN_VERSION": "3.6.3",
-			"MAVEN_DOWNLOAD_SHA": "c35a1803a6e70a126e80b2b3ae33eed961f83ed74d18fcd16909b2d44d7dada3203f1ffe726c17ef8dcca2dcaa9fca676987befeadc9b9f759967a8cb77181c0",
-			"INSTALL_GRADLE": "true",
-			"GRADLE_VERSION": "5.4.1",
-			"GRADLE_DOWNLOAD_SHA": "7bdbad1e4f54f13c8a78abc00c26d44dd8709d4aedb704d913fb1bb78ac025dc",
-			"INSTALL_NODE": "false",
-			"NODE_VERSION": "lts/*"
-		}
-	},
-
+	"image": "mcr.microsoft.com/devcontainers/java:17-bookworm",
 	// Set *default* container specific settings.json values on container create.
-	"settings": { 
+	"settings": {
 		"terminal.integrated.shell.linux": "/bin/bash",
-		"java.home": "/docker-java-home"
 	},
-
 	// Add the IDs of extensions you want installed when the container is created.
 	"extensions": [
 		"vscjava.vscode-java-pack"
-	]
-
+	],
+	"features": {
+		"ghcr.io/devcontainers/features/java:1": {
+			"version": "none",
+			"installGradle": "true",
+			"installMaven": "true"
+		},
+		"ghcr.io/devcontainers/features/node:1": {
+      		"version": "latest"
+    	}
+	}
 	// Use 'forwardPorts' to make a list of ports inside the container available locally.
 	// "forwardPorts": [],
-
 	// Use 'postCreateCommand' to run commands after the container is created.
 	// "postCreateCommand": "java -version",
-
 	// Uncomment to connect as a non-root user. See https://aka.ms/vscode-remote/containers/non-root.
 	// "remoteUser": "vscode"
-}
+}