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/Sources/Public/Enumerations/Artifact.swift

@@ -0,0 +1,16 @@
+public enum Artifact: String {
+    case executable
+    case image
+}
+
+// MARK: - Randomable
+
+extension Artifact: Randomable {
+    
+    // MARK: Functions
+    
+    static func random() -> Artifact {
+        .allCases.randomElement() ?? .executable
+    }
+    
+}

Library/Sources/Public/Enumerations/IDE.swift

@@ -3,9 +3,9 @@ public enum IDE: String {
     case xcode
 }
 
-// MARK: - Extension
+// MARK: - Randomable
 
-extension IDE {
+extension IDE: Randomable {
     
     // MARK: Functions
     
@@ -14,7 +14,3 @@ extension IDE {
     }
     
 }
-
-// MARK: - CaseIterable
-
-extension IDE: CaseIterable {}