Add hcl extention for nomad files

to get syntax highlighting be default.

2-nomad-config/hello-world.nomad.hcl

@@ -0,0 +1,60 @@
+job "hello-world" {
+  group "servers" {
+    network {
+      port "www" {
+        to = -1
+      }
+    }
+
+    service {
+      name = "hello-world"
+      port = "www"
+    
+      tags = [
+        "traefik.enable=true",
+      ]
+
+      check {
+        name     = "alive"
+        type     = "tcp"
+        port     = "www"
+        interval = "10s"
+        timeout  = "2s"
+      }
+    }
+    
+
+    # Tasks are individual units of work that are run by Nomad.
+    task "web" {
+      # This particular task starts a simple web server within a Docker container
+      driver = "docker"
+
+      config {
+        image   = "busybox:1"
+        command = "httpd"
+        args    = ["-v", "-f", "-p", "${NOMAD_PORT_www}", "-h", "/local"]
+        ports   = ["www"]
+      }
+
+      template {
+        data        = <<-EOF
+                      <h1>Hello, Nomad!</h1>
+                      <ul>
+                        <li>Task: {{env "NOMAD_TASK_NAME"}}</li>
+                        <li>Group: {{env "NOMAD_GROUP_NAME"}}</li>
+                        <li>Job: {{env "NOMAD_JOB_NAME"}}</li>
+                        <li>Metadata value for foo: {{env "NOMAD_META_foo"}}</li>
+                        <li>Currently running on port: {{env "NOMAD_PORT_www"}}</li>
+                      </ul>
+                      EOF
+        destination = "local/index.html"
+      }
+
+      # Specify the maximum resources required to run the task
+      resources {
+        cpu    = 50
+        memory = 64
+      }
+    }
+  }
+}