add docs on configuring TSLint for Prettier

docs/SUMMARY.md

@@ -15,6 +15,7 @@
 * [Module bundling](./in-depth/module-bundling.md)
 * [Deploy destinations](./in-depth/deploy-destinations.md)
 * [TypeScript](./in-depth/typescript.md)
+* [Prettier](./in-depth/prettier.md)
 * [Cookbook](./in-depth/cookbook.md)
   * [Environment variables](./in-depth/cookbook/environment-variables.md)
   * [One-line PowerShell setup](./in-depth/cookbook/one-line-powershell.md)

docs/in-depth/prettier.md

@@ -1,4 +1,4 @@
-# Prettier
+# Code formatting with Prettier
 
 [Prettier](https://prettier.io/) is an automatic code formatter which supports various languages, including TypeScript. It also has extensions for various text editors like [VSCode](https://github.com/prettier/prettier-vscode), [Atom](https://github.com/prettier/prettier-atom), and even [Vim](https://github.com/prettier/vim-prettier). If you have installed these extensions, it will use Prettier's service to automatically format your code after saving.
 
@@ -17,3 +17,42 @@ If you would rather not use Prettier instead, you can easily disable it too. In
   }
 }
 ```
+
+## Configuring TSLint for Prettier
+
+The `.prettierrc` file configures how Prettier formats your code. By default we use the following options.
+
+```json
+{
+  "semi": true,
+  "tabWidth": 2,
+  "printWidth": 120,
+  "singleQuote": false,
+  "trailingComma": "none"
+}
+```
+
+We can use `tslint-config-prettier` to override some TSLint rules with its Prettier counterparts. In your `tslint.json` file, extend `tslint-config-prettier`.
+
+```json
+{
+  "extends" : [
+    "tslint:recommended",
+    "tslint-config-prettier"
+  ]
+}
+```
+
+To make Prettier error out on formatting errors, we can also use `tslint-plugin-prettier` to add a custom rule for this.
+
+```bash
+yarn add --dev tslint-plugin-prettier
+```
+
+```json
+{
+  "rulesDirectory": ["tslint-plugin-prettier"],
+  "rules": {
+    "prettier": true
+  }
+}

tslint.json

@@ -10,7 +10,6 @@
     "member-ordering": [false],
     "no-console": [false],
     "no-namespace": [true, "allow-declarations"],
-    "trailing-comma": [true, {"multiline": "never", "singleline": "never"}],
     "variable-name": [
       true,
       "ban-keywords",