Enhance Docker deployment with environment variable configuration

- Added environment variable setup in docker-compose.yml for VITE_API_URL.
- Introduced update-docker-env.sh script to create/update .env file for local and remote deployments.
- Updated Dockerfile to dynamically create env-config.js during build.
- Modified frontend to load environment configuration from env-config.js.
- Refactored API client to use centralized config for API URL.

worklenz-frontend/src/config/env.ts

@@ -0,0 +1,31 @@
+/**
+ * Environment configuration
+ * Reads from window.VITE_API_URL (set by env-config.js)
+ * Falls back to import.meta.env.VITE_API_URL (set during build time)
+ * Falls back to a development default
+ */
+
+declare global {
+  interface Window {
+    VITE_API_URL?: string;
+  }
+}
+
+export const getApiUrl = (): string => {
+  // First check runtime-injected environment variables
+  if (window.VITE_API_URL) {
+    return window.VITE_API_URL;
+  }
+  
+  // Then check build-time environment variables
+  if (import.meta.env.VITE_API_URL) {
+    return import.meta.env.VITE_API_URL;
+  }
+  
+  // Default for development
+  return 'http://localhost:3000';
+};
+
+export default {
+  apiUrl: getApiUrl(),
+};