Use the extended syntax for the ports.

defaults/main.yml

@@ -16,6 +16,7 @@ shinyproxy_conf_dir: '{{ shinyproxy_install_dir }}'
 shinyproxy_log_dir: /var/log/shinyproxy
 shinyproxy_bind_address: 127.0.0.1
 shinyproxy_http_port: 8080
+shinyproxy_docker_http_port_mode: 'host'
 shinyproxy_heartbeat_rate: 10000
 shinyproxy_heartbeat_timeout: 60000
 shinyproxy_undertow_loglevel: 'INFO'

templates/shinyproxy-docker-compose.yml.j2

@@ -17,9 +17,15 @@ services:
 {% if shinyproxy_container_backend == 'docker' %}
     build: .
     ports:
-      - {{ shinyproxy_http_port }}:{{ shinyproxy_http_port }}
+      - target: {{ shinyproxy_http_port }}
+        published: :{{ shinyproxy_http_port }}
+        protocol: tcp
+        mode: '{{ shinyproxy_docker_http_port_mode }}'
 {% if shinyproxy_expose_prometheus and shinyproxy_version is version_compare('2.5.0', '>=') %}
-      - {{ shinyproxy_prometheus_port }}:9090
+      - target: 9090
+        published: {{ shinyproxy_prometheus_port }}
+        protocol: tcp
+        mode: 'host'
 {% endif %}
 {% else %}
     image: {{ shinyproxy_docker_image }}