Improved the Build subcommand to support the building of Docker images (#11)

This PR contains the work done to support the building of Docker images in the `Build` subcommand in the executable target. So, for this purpose, the following task have been done:

- added a basic boilerplate of the `docker-compose.yml` file;
- fixed some issues found in the boilerplate of the `Dockerfile` file;
- defined the `Randomable` protocol;
- defined the `Artifact` enumeration;
- updated the `BuildProjectTask` task to support building Docker images if required;
- renamed the `BuildProjectTask` task as `BuildArtifactTask`.

Reviewed-on: #11
Co-authored-by: Javier Cicchelli <javier@rock-n-code.com>
Co-committed-by: Javier Cicchelli <javier@rock-n-code.com>

Library/Resources/Files/Sources/DockerCompose

@@ -0,0 +1,7 @@
+services:
+  app:
+    build:
+      context: .
+    port:
+      - 3000:8080
+    command: ["--hostname", "0.0.0.0", "--port", "8080"]

Library/Resources/Files/Sources/DockerFile

@@ -1,7 +1,7 @@
 # ================================
 # Build image
 # ================================
-FROM swift:6.0-noble as build
+FROM swift:6.0.3-noble AS build
 
 # Install OS updates
 RUN export DEBIAN_FRONTEND=noninteractive DEBCONF_NONINTERACTIVE_SEEN=true \
@@ -83,5 +83,5 @@ USER hummingbird:hummingbird
 EXPOSE 8080
 
 # Start the Hummingbird service when the image is run, default to listening on 8080 in production environment
-ENTRYPOINT ["./App]
+ENTRYPOINT ["./App"]
 CMD ["--hostname", "0.0.0.0", "--port", "8080"]