To build all the integrations just use npm run build in root folder.
Integrations are workspaces in root package.json.
When you add new integration you have to generate index.ts file using gecli gei init
After you finish updating integration or finish writing the new one, just use npm run integrate inside of the integration folder to generate resolvers into stucco.json. You can update all integrations using the same command at the root folder.
You can test integrations in sample project in sandbox folder. If you're adding a new resolvers you have to update the schema 'beerpub-graphql-integrations' in the web at graphql-editor and connect resolvers in 'Microservices' section.
To update prepared schema and connected resolvers in stucco.json use command npm run update inside of 'packages/sandboxes/rest-users-s3'.