Response compression for the Website service (#7)

This PR contains the work done to add response compression to the Website service by registering the `ResponseCompressionMiddleware` middleware so responses are compressed when the client advertises support and the body exceeds a minimum size.

To provide further details about the work done:

* Added the **HummingbirdCompression** package dependency.
* Integrated the `ResponseCompressionMiddleware` middleware into the router, ahead of the not-found and static file middleware.
* Made the `minimum-response-size-to-compress` threshold configurable, with a default.

Reviewed-on: rock-n-code/loud-amsterdam#7
Co-authored-by: Javier Cicchelli <javier@rock-n-code.com>
Co-committed-by: Javier Cicchelli <javier@rock-n-code.com>

Services/Website/Package.swift

@@ -31,6 +31,10 @@ let package = Package(
             url: "https://github.com/hummingbird-project/hummingbird.git",
             from: "2.25.0"
         ),
+        .package(
+            url: "https://github.com/hummingbird-project/hummingbird-compression.git",
+            from: "2.0.0"
+        ),
         .package(
             url: "https://github.com/apple/swift-configuration.git",
             from: "1.0.0",
@@ -53,6 +57,10 @@ let package = Package(
                     name: "Hummingbird",
                     package: "hummingbird"
                 ),
+                .product(
+                    name: "HummingbirdCompression",
+                    package: "hummingbird-compression"
+                ),
             ],
             path: "Sources/App"
         ),