docs: zstd compression feature description [skip ci]

Author: joseluisq

README.md

@@ -42,7 +42,7 @@ It's cross-platform and available for `Linux`, `macOS`, `Windows` and `FreeBSD`
 - Memory-safe and significantly reduced CPU and RAM overhead.
 - Blazing fast static files-serving and asynchronous powered by the latest [Hyper](https://github.com/hyperium/hyper/), [Tokio](https://github.com/tokio-rs/tokio) and a set of [awesome crates](https://github.com/static-web-server/static-web-server/blob/master/Cargo.toml).
 - Single __4MB__ (uncompressed) and fully static binary with no dependencies ([Musl libc](https://doc.rust-lang.org/edition-guide/rust-2018/platform-and-target-support/musl-support-for-fully-static-binaries.html)). Suitable for running on [any Linux distro](https://en.wikipedia.org/wiki/Linux_distribution) or [Docker container](https://hub.docker.com/r/joseluisq/static-web-server/tags).
-- Optional GZip, Deflate or Brotli compression for text-based web files only.
+- Optional GZip, Deflate, Brotli or Zstandard (zstd) compression for text-based web files only.
 - Compression on-demand via [Accept-Encoding](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept-Encoding) header.
 - [Partial Content Delivery](https://en.wikipedia.org/wiki/Byte_serving) support for byte-serving of large files.
 - Optional [Cache-Control](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cache-Control) headers for assets.

docs/content/features/compression-static.md

@@ -1,8 +1,8 @@
 # Pre-compressed files serving
 
-**`SWS`** provides support to serve pre-compressed [`Gzip`](https://datatracker.ietf.org/doc/html/rfc1952) or [`Brotli`](https://www.ietf.org/rfc/rfc7932.txt) files directly from the disk.
+**`SWS`** provides support to serve pre-compressed [`Gzip`](https://datatracker.ietf.org/doc/html/rfc1952), [`Brotli`](https://www.ietf.org/rfc/rfc7932.txt) and [`Zstandard` (zstd)](https://datatracker.ietf.org/doc/html/rfc8878) files directly from the disk.
 
-SWS can look up existing pre-compressed file variants (`.gz` or `.br`) on disk and serve them directly.
+SWS can look up existing pre-compressed file variants (`.gz`, `.br` or `zst`) on disk and serve them directly.
 
 The feature is disabled by default and can be controlled by the boolean `--compression-static` option or the equivalent [SERVER_COMPRESSION_STATIC](./../configuration/environment-variables.md#server_compression_static) env.
 
@@ -14,7 +14,6 @@ Otherwise, if the pre-compressed file is not found then SWS just continues the n
 
 Here is an example:
 
-
 ```sh
 static-web-server -p=8787 -d=/var/www --compression-static=true -g=trace
 ```
@@ -34,4 +33,3 @@ Below are some relevant log entries to show how the feature works.
 2022-09-22T21:30:12.905965Z TRACE encode_headers: hyper::proto::h1::role: close time.busy=138µs time.idle=35.4µs
 2022-09-22T21:30:12.906236Z DEBUG hyper::proto::h1::io: flushed 242 bytes
 ```
-

docs/content/features/compression.md

@@ -1,12 +1,12 @@
 # Compression
 
-**`SWS`** provides [`Gzip`](https://datatracker.ietf.org/doc/html/rfc1952), [`Deflate`](https://datatracker.ietf.org/doc/html/rfc1951#section-Abstract) and [`Brotli`](https://www.ietf.org/rfc/rfc7932.txt) compression of HTTP responses.
+**`SWS`** provides [`Gzip`](https://datatracker.ietf.org/doc/html/rfc1952), [`Deflate`](https://datatracker.ietf.org/doc/html/rfc1951#section-Abstract), [`Brotli`](https://www.ietf.org/rfc/rfc7932.txt) and [`Zstandard` (zstd)](https://datatracker.ietf.org/doc/html/rfc8878) compression of HTTP responses.
 
 The compression functionality is determined by the [`Accept-Encoding`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept-Encoding) header and is only applied to text-based web file types.
 
 ## MIME types compressed
 
-Only this list of common text-based MIME type files will be compressed either with `Gzip`, `Deflate` or `Brotli` via the `Accept-Encoding` header value.
+Only this list of common text-based MIME-type files will be compressed either with `Gzip`, `Deflate` or `Brotli` via the `Accept-Encoding` header value.
 
 ```txt
 text/html

docs/content/index.md

@@ -31,23 +31,23 @@
 
 ## Overview
 
-**Static Web Server** (or **`SWS`** abbreviated) is a very small and fast production-ready web server suitable to serve static web files or assets.
+**Static Web Server** (or **`SWS`** abbreviated) is a tiny and fast production-ready web server suitable to serve static web files or assets.
 
-It is focused on **lightness** and **easy-to-use** principles while keeping [high performance and safety](https://blog.rust-lang.org/2015/04/10/Fearless-Concurrency.html) powered by [The Rust Programming Language](https://rust-lang.org).
+It is focused on **lightness and easy-to-use** principles while keeping [high performance and safety](https://blog.rust-lang.org/2015/04/10/Fearless-Concurrency.html) powered by [The Rust Programming Language](https://rust-lang.org).
 
-Written on top of [Hyper](https://github.com/hyperium/hyper) and [Tokio](https://github.com/tokio-rs/tokio) runtime. It provides [concurrent and asynchronous networking abilities](https://rust-lang.github.io/async-book/01_getting_started/02_why_async.html) as well as the latest HTTP/1 - HTTP/2 implementations.
+Written on top of [Hyper](https://github.com/hyperium/hyper) and [Tokio](https://github.com/tokio-rs/tokio) runtime, it provides [concurrent and asynchronous networking abilities](https://rust-lang.github.io/async-book/01_getting_started/02_why_async.html) and the latest HTTP/1 - HTTP/2 implementations.
 
-It's cross-platform and available for Linux, macOS, Windows and FreeBSD (`x86`,`x86_64`,`ARM`,`ARM64`) as well as Docker.
+It's cross-platform and available for `Linux`, `macOS`, `Windows` and `FreeBSD` (`x86`/`x86_64`,  `ARM`/`ARM64`) and `Docker`.
 
 ![static-web-server](https://user-images.githubusercontent.com/1700322/152613820-658f025c-d0a4-46b3-aa6d-bdc7f638ce77.png)
 
 ## Features
 
-- Built with [Rust](https://rust-lang.org) which is focused on [safety, speed and concurrency](https://kornel.ski/rust-c-speed).
-- Memory safe and very reduced CPU and RAM overhead.
-- Blazing fast static files-serving and asynchronous powered by latest [Hyper](https://github.com/hyperium/hyper/), [Tokio](https://github.com/tokio-rs/tokio) and a set of [awesome crates](https://github.com/static-web-server/static-web-server/blob/master/Cargo.toml).
+- Built with [Rust](https://rust-lang.org), which focuses on [safety, speed and concurrency](https://kornel.ski/rust-c-speed).
+- Memory-safe and significantly reduced CPU and RAM overhead.
+- Blazing fast static files-serving and asynchronous powered by the latest [Hyper](https://github.com/hyperium/hyper/), [Tokio](https://github.com/tokio-rs/tokio) and a set of [awesome crates](https://github.com/static-web-server/static-web-server/blob/master/Cargo.toml).
 - Single __4MB__ (uncompressed) and fully static binary with no dependencies ([Musl libc](https://doc.rust-lang.org/edition-guide/rust-2018/platform-and-target-support/musl-support-for-fully-static-binaries.html)). Suitable for running on [any Linux distro](https://en.wikipedia.org/wiki/Linux_distribution) or [Docker container](https://hub.docker.com/r/joseluisq/static-web-server/tags).
-- Optional GZip, Deflate or Brotli compression for text-based web files only.
+- Optional GZip, Deflate, Brotli or Zstandard (zstd) compression for text-based web files only.
 - Compression on-demand via [Accept-Encoding](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept-Encoding) header.
 - [Partial Content Delivery](https://en.wikipedia.org/wiki/Byte_serving) support for byte-serving of large files.
 - Optional [Cache-Control](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cache-Control) headers for assets.
@@ -56,7 +56,7 @@ It's cross-platform and available for Linux, macOS, Windows and FreeBSD (`x86`,`
 - [Security headers](https://web.dev/security-headers/) for HTTP/2 by default.
 - [HEAD](https://tools.ietf.org/html/rfc7231#section-4.3.2) responses.
 - Lightweight and configurable logging via [tracing](https://github.com/tokio-rs/tracing) crate.
-- Customizable number of worker threads.
+- A Customizable number of worker threads.
 - Optional directory listing.
 - [CORS](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS) support.
 - Basic HTTP Authentication.
@@ -68,7 +68,7 @@ It's cross-platform and available for Linux, macOS, Windows and FreeBSD (`x86`,`
 - Custom URL rewrites and redirects via glob patterns.
 - Support for serving pre-compressed (Gzip/Brotli) files.
 - First-class [Docker](https://docs.docker.com/get-started/overview/) support. [Scratch](https://hub.docker.com/_/scratch) and latest [Alpine Linux](https://hub.docker.com/_/alpine) Docker images.
-- Ability to accept a socket listener as a file descriptor for use in sandboxing and on-demand applications (E.g [systemd](http://0pointer.de/blog/projects/socket-activation.html)).
+- Ability to accept a socket listener as a file descriptor for sandboxing and on-demand applications (e.g [systemd](http://0pointer.de/blog/projects/socket-activation.html)).
 - Cross-platform. Pre-compiled binaries for Linux, macOS, Windows and FreeBSD (`x86`,`x86_64`,`ARM`,`ARM64`).
 
 ## Benchmarks