Add landingpage deployment

roles/landingpage/templates/docker-stack.yml.j2

@@ -0,0 +1,20 @@
+version: '3.4'
+
+services:
+  app:
+    image: "{{ stack_image }}:{{ landingpage_version }}"
+    healthcheck:
+      test: ["CMD", "wget", "--spider", "-q", "localhost"]
+      interval: 1m
+      timeout: 10s
+      retries: 3
+      start_period: 1m
+    entrypoint: sh -c "/docker-entrypoint.sh nginx -g 'daemon off;'"
+    networks:
+      - "{{ docker_swarm_public_network_name }}"
+
+networks:
+  "{{ docker_swarm_public_network_name }}":
+    external: true
+
+

roles/landingpage/templates/upstream.json.j2

@@ -0,0 +1,42 @@
+{
+    "@id": "{{ stack_name }}_upstream",
+{% if server_domain is not undefined and not none %}   
+    "match": [
+        {
+            "host": [
+{% if subdomain_alias is not undefined and not none %}
+                "{{ subdomain_alias }}.{{ server_domain }}"
+{% else %}
+                "{{ stack_name }}.{{ server_domain }}"
+{% endif %}
+            ,
+            "{{ server_domain }}"
+            ]
+        }
+    ],
+{% else %}
+    "match": [
+        {
+            "path": [
+{% if subdomain_alias is not undefined and not none %}
+                "/{{ subdomain_alias }}*"
+{% else %}
+                "/{{ stack_name }}*"
+{% endif %}
+            ,
+            "/"
+            ]
+        }
+    ],
+{% endif %}
+    "handle": [
+        {
+            "handler": "reverse_proxy",
+            "upstreams": [
+                {
+                    "dial": "{{ stack_name }}_app:80"
+                }
+            ]
+        }
+    ]
+}