Add dev container

Signed-off-by: James Taylor <jamest@uk.ibm.com>

.devcontainer/devcontainer.json

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+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/typescript-node
+{
+	"name": "Node.js & TypeScript",
+	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
+	"image": "mcr.microsoft.com/devcontainers/typescript-node:0-18",
+
+	// Features to add to the dev container. More info: https://containers.dev/features.
+	// "features": {},
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	"forwardPorts": [
+		8000,
+		9000
+	],
+
+	"remoteUser": "node",
+	"mounts": [
+		"source=${localWorkspaceFolderBasename}-node_modules,target=${containerWorkspaceFolder}/node_modules,type=volume"
+	],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	"postCreateCommand": "sudo chown node node_modules && npm install"
+
+	// Configure tool-specific properties.
+	// "customizations": {},
+
+	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+	// "remoteUser": "root"
+}

.vscode/tasks.json

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+{
+    // See https://go.microsoft.com/fwlink/?LinkId=733558
+    // for the documentation about the tasks.json format
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "Serve (Development)",
+            "type": "shell",
+            "command": "npm run develop",
+            "group": {
+                "kind": "build"
+            },
+            "isBackground": true,
+            "problemMatcher": []
+        },
+        {
+            "label": "Serve",
+            "type": "shell",
+            "command": "npm run build && npm run serve",
+            "group": {
+                "kind": "build"
+            },
+            "isBackground": true,
+            "problemMatcher": []
+        }
+    ]
+}