feat: add environment variable handling in Dockerfile and update Firebase configuration

Dockerfile

@@ -10,15 +10,9 @@ RUN npm run build
 FROM nginx:alpine
 COPY --from=builder /app/dist /usr/share/nginx/html
 COPY nginx.conf /etc/nginx/conf.d/default.conf
+COPY env.sh /docker-entrypoint.d/env.sh
+RUN chmod +x /docker-entrypoint.d/env.sh
+
 EXPOSE 80
 
-ENV VITE_API_BASE_URL=https://api.example.com
-ENV VITE_FIREBASE_API_KEY=firebase-api
-ENV VITE_FIREBASE_AUTH_DOMAIN=firebase-auth
-ENV VITE_FIREBASE_PROJECT_ID=firebase-project
-ENV VITE_FIREBASE_STORAGE_BUCKET=firebase-storage
-ENV VITE_FIREBASE_MESSAGING_SENDER_ID=firebase-messaging
-ENV VITE_FIREBASE_APP_ID=firebase-app
-ENV VITE_FIREBASE_MEASUREMENT_ID=firebase-measurement
-
 CMD ["nginx", "-g", "daemon off;"]