You need to make 2 changes to your skywalker-web project, find the src/config.js file and change port from 3000 to 80
const apiUrl = `${process.env.EXTERNAL_API_URL || 'http://localhost:3000/api'}/v1`;
const ssrApiUrl = `${process.env.INTERNAL_API_URL || 'http://localhost:3000/api'}/v1`;
const apiUrl = `${process.env.EXTERNAL_API_URL || 'http://localhost:80/api'}/v1`;
const ssrApiUrl = `${process.env.INTERNAL_API_URL || 'http://localhost:80/api'}/v1`;
And then just run the proxy with npm start and then run yarn start from skywalker-web/ to start Skywalker in development mode for FE.
Open http://localhost:80/ to see the app.