Add Nomad templates

roles/nomad/templates/server.hcl.j2

@@ -0,0 +1,28 @@
+# {{ ansible_managed }}
+# Nomad Server Configuration
+
+server {
+  enabled          = true
+  bootstrap_expect = {{ nomad_bootstrap_expect }}
+  
+{% if nomad_retry_join | length > 0 %}
+  server_join {
+    retry_join = {{ nomad_retry_join | to_json }}
+  }
+{% endif %}
+
+  # Raft performance
+  raft_protocol = 3
+  
+  # Enable memory/CPU preemption for system jobs
+  default_scheduler_config {
+    scheduler_algorithm             = "binpack"
+    memory_oversubscription_enabled = true
+    
+    preemption_config {
+      batch_scheduler_enabled    = true
+      system_scheduler_enabled   = true
+      service_scheduler_enabled  = true
+    }
+  }
+}