Add customizations (#43)

.devcontainer/devcontainer.json

@@ -15,6 +15,10 @@
 	},
 	"runArgs": [ "--cap-add=SYS_PTRACE", "--security-opt", "seccomp=unconfined" ],
 
+	// Configure tool-specific properties.
+	"customizations": {
+		// Configure properties specific to VS Code.
+		"vscode": {
 			// Set *default* container specific settings.json values on container create.
 			"settings": { 
 				"go.toolsManagement.checkForUpdates": "local",
@@ -26,7 +30,9 @@
 			// Add the IDs of extensions you want installed when the container is created.
 			"extensions": [
 				"golang.Go"
-	],
+			]
+		}
+	},
 
 	// Use 'forwardPorts' to make a list of ports inside the container available locally.
 	// "forwardPorts": [9000],