add devcontainer

.devcontainer/postCreateCommand.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+set -e
+
+# Upgrade pip
+python -m pip install --upgrade pip
+
+# Install Python packages
+pip install -U platformio css_html_js_minify
+
+# Navigate to the Svelte app directory
+cd lib/SvelteUi/app
+
+# Install npm dependencies and build the app
+npm ci
+npm run build
+
+# Return to the previous directory
+cd -