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PHP is a scripting language for creating websites.

JavaScript is a lightweight, object-oriented, cross-platform scripting language, often used within web pages.

Nginx (pronounced as "engine X") is a lightweight open source web server developed by Igor Sysoev.

Hetzner is a German web hosting provider.

Multacom is a US-based web hosting provider.

ColoCrossing is a US-based web hosting provider owned by HostPapa.

Hetzner is a German web hosting provider.

Multacom is a US-based web hosting provider.

HostPapa is a web hosting provider headquartered in Canada. This includes the former brands Lunarpages, PacificHost and others.

Google provides various services to run on its servers.

Tencent is a Chinese IT and telecommunication services provider. This includes its QQ and DNSPod brands.

NetEase (also known as 163.com) is a Chinese internet technology company.

Let’s Encrypt is a free, automated, and open certificate authority provided by the Internet Security Research Group.

Certum (formerly Unizeto) is a Polish SSL certificate authority owned by Asseco.

The CDNJS is a content distribution network, hosting a large number of JavaScript libraries, provided by CloudFlare.

External Cascading Style Sheets define style rules in a separate CSS file.

Embedded Cascading Style Sheets define a set of style rules in a <style> element within a web page.

Inline Cascading Style Sheets define style rules directly within an (X)HTML element using the style attribute.

Session cookies are temporary cookies, which are deleted when the user closes the browser.

Non-HttpOnly cookies are used in the HTTP protocol and also in client side scripts, which may be a security threat.

Non-secure cookies may be used via an unencrypted connections, which may be a security threat.

Gzip (GNU zip) is a file compression algorithm.

A weak ETag is an HTTP header field for validation of cached web pages, that indicates a semantically equivalent page in the cache.

HTTP Strict Transport Security (HSTS) defines a mechanism enabling web sites to declare themselves accessible only via secure connections.

The websites redirects visitors to use SSL encryption, e.g. from http://example.com/ to https://example.com/.

HTML5 is the fifth revision of the HTML standard.

UTF-8 (8-bit Unicode Transformation Format) is a variable-length character encoding for Unicode, which is backwards compatible with ASCII.

PNG (Portable Network Graphics) is a lossless compression image format, suitable to store graphics with uniformly colored areas, and originally introduced as a free, open-source successor of GIF.

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