Update devcontainer.json with Java and Maven configurations

.devcontainer/devcontainer.json

@@ -1,47 +1,32 @@
-// // For format details, see https://aka.ms/vscode-remote/devcontainer.json or this file's README at:
-// // https://github.com/microsoft/vscode-dev-containers/tree/v0.128.0/containers/java-8
-// {
-// 	"name": "ChengDu Airport MsgExchange",
-// 	"dockerFile": "Dockerfile",
-
-// 	// Set *default* container specific settings.json values on container create.
-// 	"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",
-// 		"streetsidesoftware.code-spell-checker"
-// 	],
-
-// 	// Use 'forwardPorts' to make a list of ports inside the container available locally.
-// 	"forwardPorts": [8080],
-
-// 	// 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"
-// }
 // 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": "Java",
 	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
-	"image": "mcr.microsoft.com/devcontainers/java:1-8-bullseye",
+	"image": "mcr.microsoft.com/devcontainers/java:8",
 
 	"features": {
 		"ghcr.io/devcontainers/features/java:1": {
-			"version": "none",
-			"installMaven": true,
-			"installGradle": false
+			"version":"none",
+			"installMaven": "true",
+			"mavenVersion": "3.8.6",
+			"installGradle": "false"
+		}
+	},
+
+	// Configure tool-specific properties.
+	"customizations": {
+		// Configure properties specific to VS Code.
+		"vscode": {
+			"settings": {},
+			"extensions": [
+				"streetsidesoftware.code-spell-checker"
+			]
 		}
 	},
 	"mounts": [
 		"source=${localEnv:HOME}/.ssh,target=/home/vscode/.ssh,type=bind,consistency=cached",
-		"source=${localEnv:HOME}/.m2/settings.xml,target=/usr/local/sdkman/candidates/maven/current/conf/settings.xml,type=bind,consistency=cached"
+		"source=${localEnv:HOME}/.m2,target=/home/vscode/.m2,type=bind,consistency=cached",
 	]
 
 	// Use 'forwardPorts' to make a list of ports inside the container available locally.