Added Nomad example with routes config (#413)

docs/nomad-example.nomad.hcl

@@ -0,0 +1,91 @@
+job "mc-router" {
+  datacenters = ["dc1"]
+  type = "service"
+
+  update {
+    max_parallel = 1
+    min_healthy_time = "10s"
+    healthy_deadline = "5m"
+    progress_deadline = "10m"
+    auto_revert = false
+    canary = 0
+  }
+
+  migrate {
+    max_parallel = 1
+    health_check = "checks"
+    min_healthy_time = "10s"
+    healthy_deadline = "5m"
+  }
+
+  group "mc-router" {
+    count = 1
+
+    network {
+      port "minecraft" {
+        static = 25565
+      }
+    }
+
+    service {
+      name     = "mc-router"
+      tags     = ["global", "minecraft", "tcp"]
+      port     = "minecraft"
+      provider = "consul"
+
+      check {
+        name     = "alive"
+        type     = "tcp"
+        port     = "minecraft"
+        interval = "10s"
+        timeout  = "2s"
+      }
+    }
+
+    restart {
+      attempts = 2
+      interval = "30m"
+      delay = "15s"
+      mode = "delay"
+    }
+
+    task "mc-router" {
+      driver = "docker"
+
+      config {
+        image = "itzg/mc-router"
+        ports = ["minecraft"]
+        auth_soft_fail = true
+      }
+
+      resources {
+        cpu        = 2000  # 2000Mhz
+        memory     = 256 # 256MB
+      }
+
+      template {
+        data = <<EOF
+{
+  "mappings": {
+    {{- $first := true -}}
+    {{- range service "mc-router-register.minecraft" }}
+      {{- if not $first }},{{ end }}
+      "{{ .ServiceMeta.externalServerName }}": "{{ .Address }}:{{ .Port }}"
+      {{- $first = false }}
+    {{- end }}
+  }
+}
+EOF
+        destination = "local/routes.json"
+        change_mode = "signal"
+        change_signal = "SIGHUP"
+      }
+
+      env {
+        ROUTES_CONFIG = "local/routes.json"
+        DEBUG = "true"
+        TRACE = "true"
+      }
+    }
+  }
+}