Add Development Container

Author: CrazyMarvin

.devcontainer /devcontainer.json

@@ -0,0 +1,44 @@
+// 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/v0.195.0/containers/java
+{
+	"name": "Java",
+	"build": {
+		"dockerfile": "Dockerfile",
+		"args": {
+			// Update the VARIANT arg to pick a Java version: 8, 11, 17
+			// Append -bullseye or -buster to pin to an OS version.
+			// Use the -bullseye variants on local arm64/Apple Silicon.
+			"VARIANT": "17-bullseye",
+			// Options
+			"INSTALL_MAVEN": "true",
+			"MAVEN_VERSION": "3.8.5",
+			"INSTALL_GRADLE": "true",
+			"NODE_VERSION": "lts/*"
+		}
+	},
+		
+	// Configure tool-specific properties.
+	"customizations": {
+		// Configure properties specific to VS Code.
+		"vscode": {
+			// Set *default* container specific settings.json values on container create.
+			"settings": { 
+				"maven.executable.path": "/usr/local/sdkman/candidates/maven/current/bin/mvn"
+			},
+			
+			// Add the IDs of extensions you want installed when the container is created.
+			"extensions": [
+				"vscjava.vscode-java-pack"
+			]
+		}
+	},
+
+	// 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"
+}