How to use the gatsby-telemetry.expressMiddleware function in gatsby-telemetry
To help you get started, we’ve selected a few gatsby-telemetry examples, based on popular ways it is used in public projects.
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gatsbyjs / gatsby / packages / gatsby / src / commands / develop.ts View on Github 
const devConfig = await webpackConfig(
program,
directory,
`develop`,
program.port,
{ parentSpan: webpackActivity.span }
)
const compiler = webpack(devConfig)
/**
* Set up the express app.
**/
const app = express()
app.use(telemetry.expressMiddleware(`DEVELOP`))
app.use(
require(`webpack-hot-middleware`)(compiler, {
log: false,
path: `/__webpack_hmr`,
heartbeat: 10 * 1000,
})
)
app.use(cors())
/**
* Pattern matching all endpoints with graphql or graphiql with 1 or more leading underscores
*/
const graphqlEndpoint = `/_+graphi?ql`
if (process.env.GATSBY_GRAPHQL_IDE === `playground`) {
