fix: update npm in Docker image to fix cross-spawn vulnerability

Updates npm to latest version in the Docker image to fix
CVE-2024-21538 (cross-spawn regular expression denial of service).

The vulnerability exists in npm's dependencies in the base Node.js
image. Updating npm to latest version includes the fixed version
of cross-spawn (7.0.5+).

Severity: HIGH
Fixed in: cross-spawn 7.0.5

Author: lainra

Dockerfile

@@ -2,6 +2,9 @@ FROM node:24-alpine
 
 WORKDIR /app
 
+# Update npm to latest version to fix vulnerabilities
+RUN npm install -g npm@latest
+
 # Copy package files
 COPY package*.json ./