build: Add tsconfig.json and instructions for using it

README.md

@@ -13,3 +13,19 @@ npx install-peerdeps --dev @edx/typescript-config
 ```
 
 This will install the package and all of its peer dependencies.
+
+## Usage
+
+Create file in repository `tsconfig.json`, adding references to the root directory, output directory, and directories to include/exclude in TypeScript compilation.
+
+```json
+{
+	"extends": "@edx/tsconfig",
+	"compilerOptions": {
+        "rootDir": ".",
+        "outDir": "dist"
+	},
+    "include": ["src/**/*"],
+    "exclude": ["dist"]
+}
+```

tsconfig.json

@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+      "allowJs": true,
+      "allowSyntheticDefaultImports": true,
+      "declaration": true,
+      "esModuleInterop": true,
+      "forceConsistentCasingInFileNames": true,
+      "jsx": "react",
+      "lib": ["dom", "es6", "dom.iterable"],
+      "isolatedModules": true,
+      "module": "ES6",
+      "moduleResolution": "node",
+      "noFallthroughCasesInSwitch": true,
+      "noImplicitAny": false,
+      "noImplicitThis": true,
+      "noUnusedParameters": true,
+      "skipLibCheck": true,
+      "sourceMap": true,
+      "strict": true,
+      "strictFunctionTypes": false,
+      "target": "ES6",
+    },
+  }