feat: add basic httpbin services

Used to test connectivity of proxies

roles/httpbin/templates/docker-compose.yml.j2

@@ -0,0 +1,22 @@
+services:
+  httpbin:
+    image: {{ httpbin_image }}
+    container_name: {{ httpbin_service_name }}
+    restart: unless-stopped
+    networks:
+      - {{ httpbin_traefik_network }}
+    labels:
+      - traefik.enable=true
+      - traefik.docker.network={{ httpbin_traefik_network }}
+      - traefik.http.routers.{{ httpbin_service_name }}.rule=Host(`{{ httpbin_domain }}`)
+{% if httpbin_use_ssl %}
+      - traefik.http.routers.{{ httpbin_service_name }}.entrypoints=websecure
+      - traefik.http.routers.{{ httpbin_service_name }}.tls=true
+{% else %}
+      - traefik.http.routers.{{ httpbin_service_name }}.entrypoints=web
+{% endif %}
+      - traefik.http.services.{{ httpbin_service_name }}.loadbalancer.server.port={{ httpbin_port }}
+
+networks:
+  {{ httpbin_traefik_network }}:
+    external: true