Update installation.qmd with node feature and npm commands

Author: AkanshuS

docs/installation.qmd

@@ -8,16 +8,17 @@ If you use VSCode with Docker to develop in a container, the following VSCode De
 
 ``` json
 {
-	"name": "Python 3",
-	"image": "mcr.microsoft.com/devcontainers/python:1-3.12-bookworm",
-	"postCreateCommand": "sudo apt update && sudo apt install -y python3-dev libpq-dev graphviz libwebp-dev && uv venv && uv sync",
-	"features": {
-		"ghcr.io/va-h/devcontainers-features/uv:1": {
-			"version": "latest"
-		},
-		"ghcr.io/devcontainers/features/docker-outside-of-docker:1": {},
-		"ghcr.io/rocker-org/devcontainer-features/quarto-cli:1": {}
-	}
+    "name": "Python 3",
+    "image": "mcr.microsoft.com/devcontainers/python:1-3.12-bookworm",
+    "postCreateCommand": "sudo apt update && sudo apt install -y python3-dev libpq-dev graphviz && npm install [email protected] && npm install -g sass && npm install -g gulp && uv venv && uv sync",
+    "features": {
+        "ghcr.io/va-h/devcontainers-features/uv:1": {
+            "version": "latest"
+        },
+        "ghcr.io/devcontainers/features/docker-outside-of-docker:1": {},
+        "ghcr.io/rocker-org/devcontainer-features/quarto-cli:1": {},
+        "ghcr.io/devcontainers/features/node:1": {}
+    }
 }
 ```