Add searx deployment

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

@@ -0,0 +1,30 @@
+version: '3.7'
+
+services:
+  app:
+    image: {{ stack_image }}:{{ searx_version }}
+    networks:
+      - "{{ docker_swarm_public_network_name }}"
+    healthcheck:
+        test: ["CMD", "wget", "-q", "--spider", "http://localhost:8080"]
+        interval: 1m
+        timeout: 10s
+        retries: 3
+        start_period: 1m
+    environment:
+      - BIND_ADDRESS=0.0.0.0:8080
+{% if server_domain is not undefined and not none %}   
+      - "BASE_URL={{ (searx_use_https == True) | ternary('https', 'http') }}://{{ (subdomain_alias is not undefined and not none) | ternary(subdomain_alias, stack_name) }}.{{server_domain}}"
+{% else %}
+      - "BASE_URL={{ (searx_use_https == True) | ternary('https', 'http') }}://localhost/{{ (subdomain_alias is not undefined and not none) | ternary(subdomain_alias, stack_name) }}"
+{% endif %}
+    volumes:
+      - /etc/localtime:/etc/localtime:ro
+      - data:/etc/searx:rw
+
+volumes:
+  data:
+
+networks:
+  "{{ docker_swarm_public_network_name }}":
+    external: true