feat: implement automated Docker deployment and update README

- Replaced manual rsync/npm_deploy workflow with multi-stage Docker builds.
- Added Dockerfile and .dockerignore for staging and production environments.
- Added 'deploy:staging' and 'deploy:prod' scripts to package.json.
- Updated README.md with new deployment instructions.

package.json

@@ -16,7 +16,9 @@
         "lint": "prettier --check . && eslint .",
         "format": "prettier --write .",
         "test:integration": "playwright test",
-        "test:unit": "vitest"
+        "test:unit": "vitest",
+        "deploy:staging": "docker compose -f ../ae_env_node_app/docker-compose.yml up -d --build --remove-orphans",
+        "deploy:prod": "docker compose -f ../ae_env_node_app/docker-compose.yml build --build-arg BUILD_MODE=prod && docker compose -f ../ae_env_node_app/docker-compose.yml up -d --remove-orphans"
     },
     "devDependencies": {
         "@eslint/js": "^9.39.1",