tsconfig.json

{
  "compilerOptions": {
    /* Visit https://aka.ms/tsconfig.json to read more about this file */

    /* Language and Environment */
    "target": "esnext" /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */,
    "lib": [
      "dom",
      "esnext",
      "DOM.Iterable"
    ] /* Specify a set of bundled library declaration files that describe the target runtime environment. */,
    "jsx": "react" /* Specify what JSX code is generated. */,

    /* Modules */
    "module": "esnext" /* Specify what module code is generated. */,
    // "rootDir": "./",                                  /* Specify the root folder within your source files. */
    "moduleResolution": "node" /* Specify how TypeScript looks up a file from a given module specifier. */,

    /* Completeness */
    "skipLibCheck": true /* Skip type checking all .d.ts files. */,
    "allowSyntheticDefaultImports": true
  },
  "include": [
    "./src/**/*",
    "./gatsby-node.ts",
    "./gatsby-config.ts",
    "./plugins/**/*"
  ]
}