Added nodejs + typescript sample

.gitignore

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-lib/
+lib
 node_modules/
 coverage/
 .nyc_output/

README.md

@@ -98,6 +98,7 @@ interface Person {
 Sample integration with `xlsx-import` are placed in [./samples](./samples) directory. Currently available:
 
 * [NodeJS sample](./samples/nodejs/) of **importing an invoice** - it is pure JS example which runs on nodejs.
+* [NodeJS + TS sample](./samples/nodejs-ts/) of **importing an invoice** - it is Typescript example that can be transpiled down to pure JS or run directly with ts-node.
 
 # The configuration:
 

samples/nodejs-ts/README.md

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+# NodeJS + Typescript
+
+This is an example how to use `xlsx-import` in node + typescript.
+
+**LIB Version:** `2.3.1`
+
+## Usage
+
+```bash
+# install dependencies
+npm install
+
+# execute
+npm start
+
+# or execute and save into file
+./node_modules/.bin/ts-node src/index.ts > result.json
+```
+
+## What happened?
+
+1. Read spreadsheet file [Invoice.xlsx](invoice.xlsx)
+2. Following config import invoice data
+3. Map, return and display data _(should be same as [result.json](result.json))_.
+
+## What is worth to see here?
+
+1. Study config and interfaces: [`invoiceConfig.ts`](src/configs/invoiceConfig.ts)
+2. Usage package in [`importer.ts`](src/importer.ts)
+
+## What later:
+
+1. Study documentation: [docs](./../../README.md)
+2. Start using `xlsx-import` in your project
+3. Ask a lot, report bugs and request for help: https://github.com/Siemienik/xlsx-import/issues
+4. [Sponsor `xlsx-import` project](https://github.com/sponsors/Siemienik)