Written the Doxy installation tutorial documentation.

App/Catalogs/Doxy.docc/Tutorials/DoxyInstallation.tutorial

@@ -0,0 +1,71 @@
+@Tutorial(time: 5) {
+    @Intro(title: "Install the Doxy service in the machine") {
+        This tutorial explains step-by-step how to obtain the **Doxy** service from a remote repository and also, how 
+        to install this service into a system afterwards, so it would be ready to use by the developer.
+    }
+    
+    @Section(title: "Cloning the Doxy service") {
+        @ContentAndMedia {
+            This section focuses on how to clone (or to obtain) the **Doxy** service from its remote repository into the
+            system, so the service is ready to be installed in the machine. 
+            
+            The `git` command line tool, that is included into the *Command Line tools for Xcode* package, is therefore 
+            required to clone the repository. If the command is not already installed in the machine, then download the 
+            mentioned package from the [Downloads section in the Apple Developer website](https://developer.apple.com/download/all/).  
+        }
+        
+        @Steps {
+            @Step {
+                Check whether the `git` command is available to use in the command-line interface of choice.
+                
+                In case an absolute path is returned after the command is run, means that the command is installed in 
+                the machine. Otherwise, then it is required to install the *Command Line Tools for Xcode* in the machine 
+                from [the downloads section of the Apple Developer website]((https://developer.apple.com/download/all/)).
+                
+                @Code(name: "Check for the git command in the machine", file: "service_installation-1_1.bash")
+            }
+
+            @Step {
+                Clone the **Doxy** service from a remote repository into the machine using the `git` command.
+
+                @Code(name: "Clone the remote repository into the machine", file: "service_installation-1_2.bash")
+            }
+            
+            @Step {
+                Change the current directory to the cloned (or downloaded) folder that contains the source code of the 
+                **Doxy** service application.
+                
+                @Code(name: "Change the current directory to the cloned folder", file: "service_installation-1_3.bash")
+            }
+        }
+    }
+    
+    @Section(title: "Installing the Doxy service") {
+        @ContentAndMedia {
+            This section focuses on installing the **Doxy** command-line tool from its source code, that has been cloned 
+            (or downloaded) from the remote repository in the previous section of this tutorial.
+        }
+        
+        @Steps {
+            @Step {
+                Make a release build and then install the generated command-line executable into the machine's user binary 
+                location, to allow the developer to use this command easily.
+                
+                In case the developer does not have *admin* or *root* privileges, then it is required to copy the generated 
+                executable to some folder within the machine manually.
+                
+                @Code(name: "Install the service into the machine", file: "service_installation-2_1.bash")
+            }
+            
+            @Step {
+                Finally it is recommendable to test whether the executable has been installed in the machine or that the 
+                generated executable works as expected. 
+                
+                For this purpose, the *help* subcommand is called as a parameter 
+                with the command-line tool.
+                
+                @Code(name: "Test the service has been installed in the machine", file: "service_installation-2_2.bash")
+            }
+        }
+    }
+}

App/Catalogs/Doxy.docc/Tutorials/Installation/service_installation-1_1.bash

@@ -0,0 +1 @@
+$ which git

App/Catalogs/Doxy.docc/Tutorials/Installation/service_installation-1_2.bash

@@ -0,0 +1 @@
+$ git clone https://repo.rock-n-code.com/rock-n-code/doxy.git .

App/Catalogs/Doxy.docc/Tutorials/Installation/service_installation-1_3.bash

@@ -0,0 +1 @@
+$ cd doxy

App/Catalogs/Doxy.docc/Tutorials/Installation/service_installation-2_1.bash

@@ -0,0 +1,3 @@
+$ make install
+# Or manually copy the executable to a custom folder
+$ cp .build/release/doxy /path/to/some/folder

App/Catalogs/Doxy.docc/Tutorials/Installation/service_installation-2_2.bash

@@ -0,0 +1,3 @@
+$ doxy --help
+# In case the executable has been manually copied to some folder.
+$ ./path/to/some/folder/doxy --help