Fixes danburzo#26; adds support for --no-sandbox. Add note about node…

….js version requirements

README.md

@@ -4,6 +4,8 @@ Percollate is a command-line tool to turn web pages as beautifully formatted PDF
 
 ## Installation
 
+> 💡 `percollate` needs Node.js version 8 or later, as it uses new(ish) JavaScript syntax.
+
 You can install `percollate` globally:
 
 ```bash
@@ -92,6 +94,8 @@ cat urls.txt | xargs percollate pdf --output some.pdf
 
 On some Linux machines you'll need to [install a few more Chrome dependencies](https://github.com/GoogleChrome/puppeteer/blob/master/docs/troubleshooting.md#chrome-headless-doesnt-launch) before `percollate` works correctly. (_Thanks to @ptica for [sorting it out](https://github.com/danburzo/percollate/issues/19#issuecomment-428496041)_)
 
+The `percollate pdf` command supports the `--no-sandbox` Puppeteer flag, but make sure you're [aware of the implications](https://github.com/GoogleChrome/puppeteer/blob/master/docs/troubleshooting.md#chrome-headless-fails-due-to-sandbox-issues) before disabling the sandbox.
+
 ## See also
 
 Here are some other projects to check out if you're interested in building books using the browser:

index.js

@@ -128,7 +128,14 @@ async function bundle(items, options) {
 
 	console.log('Saving as PDF');
 	const browser = await pup.launch({
-		headless: true
+		headless: true,
+		/*
+			Allow running with no sandbox
+			See: https://github.com/danburzo/percollate/issues/26
+		 */
+		args: options.sandbox
+			? undefined
+			: ['--no-sandbox', '--disable-setuid-sandbox']
 	});
 	const page = await browser.newPage();
 	await page.goto(`file://${temp_file}`, { waitUntil: 'load' });
@@ -160,6 +167,7 @@ function with_common_options(cmd) {
 program.version(pkg.version);
 
 with_common_options(program.command('pdf [urls...]'))
+	.option('--no-sandbox', 'Passed to Puppeteer')
 	.description('Bundle web pages as a PDF file')
 	.action(pdf);