<ul><li>@apexjs-org/openapi is a package for TypeScript to create OpenAPI descriptions with Zod schemas in Node.js.</li><li>express-openapi-validator can bring the OpenAPI description to life by providing automatic validation and request handling.</li><li>Steps involve installing necessary packages, configuring TypeScript, defining schemas and paths, and creating the OpenAPI description.</li><li>Middleware for Express can be set up using express-openapi-validator for automatic request handling and validation.</li><li>Operation handlers are functions specified in the OpenAPI paths that are triggered upon valid requests.</li><li>The final step is to start the server using the created index file which sets up the REST API.</li><li>To improve security, consider using packages like helmet, cors, and express-rate-limit.</li><li>Use command ts-node-esm ./src/index.ts to start the server in a development environment.</li><li>Accessible at http://localhost:8080, the API is now ready to receive requests after following the outlined steps.</li></ul>

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