Add codespaces example for hosted fields v1 changes

Author: gregjopa

.devcontainer/advanced-integration-v1/devcontainer.json

@@ -0,0 +1,40 @@
+// For more details, see https://aka.ms/devcontainer.json.
+{
+  "name": "PayPal Advanced Integration (v1)",
+  "image": "mcr.microsoft.com/devcontainers/javascript-node:20",
+  "workspaceFolder": "/workspaces/${localWorkspaceFolderBasename}/advanced-integration/v1",
+  // Use 'onCreateCommand' to run commands when creating the container.
+  "onCreateCommand": "bash ../../.devcontainer/advanced-integration-v1/welcome-message.sh",
+  // Use 'postCreateCommand' to run commands after the container is created.
+  "postCreateCommand": "npm install",
+  // Use 'postAttachCommand' to run commands when attaching to the container.
+  "postAttachCommand": {
+    "Start server": "npm start"
+  },
+  // Use 'forwardPorts' to make a list of ports inside the container available locally.
+  "forwardPorts": [8888],
+  "portsAttributes": {
+    "8888": {
+      "label": "Preview of Advanced Checkout Flow",
+      "onAutoForward": "openBrowserOnce"
+    }
+  },
+  "secrets": {
+    "PAYPAL_CLIENT_ID": {
+      "description": "Sandbox client ID of the application.",
+      "documentationUrl": "https://developer.paypal.com/dashboard/applications/sandbox"
+    },
+    "PAYPAL_CLIENT_SECRET": {
+      "description": "Sandbox secret of the application.",
+      "documentationUrl": "https://developer.paypal.com/dashboard/applications/sandbox"
+    }
+  },
+  "customizations": {
+    "vscode": {
+      "extensions": ["vsls-contrib.codetour"],
+      "settings": {
+        "git.openRepositoryInParentFolders": "always"
+      }
+    }
+  }
+}

.devcontainer/advanced-integration-v1/welcome-message.sh

@@ -0,0 +1,23 @@
+#!/bin/sh
+
+set -e
+
+WELCOME_MESSAGE="
+👋 Welcome to the \"PayPal Advanced Checkout Integration Example\"
+
+🛠️  Your environment is fully setup with all the required software.
+
+🚀 Once you rename the \".env.example\" file to \".env\" and update \"PAYPAL_CLIENT_ID\" and \"PAYPAL_CLIENT_SECRET\", the checkout page will automatically open in the browser after the server is restarted."
+
+ALTERNATE_WELCOME_MESSAGE="
+👋 Welcome to the \"PayPal Advanced Checkout Integration Example\"
+
+🛠️  Your environment is fully setup with all the required software.
+
+🚀 The checkout page will automatically open in the browser after the server is started."
+
+if [ -n "$PAYPAL_CLIENT_ID" ] && [ -n "$PAYPAL_CLIENT_SECRET" ]; then
+    WELCOME_MESSAGE="${ALTERNATE_WELCOME_MESSAGE}"
+fi
+
+sudo bash -c "echo \"${WELCOME_MESSAGE}\" > /usr/local/etc/vscode-dev-containers/first-run-notice.txt"