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Preview and validate
Preview
Preview the AMP page just as you would preview any other static HTML site. There’s no build step or preprocessing required. You can choose to:

Open the page directly in the browser from the file system (certain elements might not work due to XMLHttpRequests failing).
Use a local web server like Apache 2 or Nginx. (Tip: For a quick web server, run python -m SimpleHTTPServer.)
Validate
Next, make sure that your AMP page is actually valid AMP, or it won’t get discovered and distributed by third-party platforms like Google Search. To validate:

Open your page in your browser.
Add "#development=1" to the URL, for example, http://localhost:8000/released.amp.html#development=1.
Open the Chrome DevTools console and check for validation errors.