atlas/tsconfig.paths.json

{
  "compilerOptions": {
    "baseUrl": ".",
    "paths": {
      "@/*": ["src/*"],
      // load type augments so we get proper typings
      "@polkadot/types/augment": ["./node_modules/@joystream/types/augment-codec/augment-types.ts"],
      "@polkadot/api/augment": ["./node_modules/@joystream/types/augment-codec/augment-api.ts"]
    }
  }
}