Update cheatsheets

lighthouse

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# lighthouse
+
+> Analyzes web applications and web pages, collecting modern performance metrics and insights on developer best practices.
+> More information: <https://github.com/GoogleChrome/lighthouse>.
+
+- Generate an HTML report for a specific website and save it to a file in the current directory:
+
+`lighthouse {{https://example.com}}`
+
+- Generate a JSON report and print it:
+
+`lighthouse --output {{json}} {{https://example.com}}`
+
+- Generate a JSON report and save it to a specific file:
+
+`lighthouse --output {{json}} --output-path {{path/to/file.json}} {{https://example.com}}`
+
+- Generate a report using the browser in headless mode without logging to `stdout`:
+
+`lighthouse --quiet --chrome-flags="{{--headless}}" {{https://example.com}}`
+
+- Generate a report, using the HTTP header key/value pairs in the specified JSON file for all requests:
+
+`lighthouse --extra-headers={{path/to/file.json}} {{https://example.com}}`
+
+- Generate a report for specific categories only:
+
+`lighthouse --only-categories={{performance,accessibility,best-practices,seo,pwa}} {{https://example.com}}`
+
+- Generate a report with device emulation and all throttling disabled:
+
+`lighthouse --screenEmulation.disabled --throttling-method={{provided}} --no-emulatedUserAgent {{https://example.com}}`
+
+- Display help:
+
+`lighthouse --help`