use lightweight stats only image for datadog (github#24482)

docker-compose.prod.tmpl.yaml

@@ -19,30 +19,14 @@ services:
       HEROKU_PRODUCTION_APP: true
       PORT: 4000
       DD_AGENT_HOST: datadog-agent
-    labels:
-      com.datadoghq.ad.logs: '[{"source": "node", "service": "docs"}]'
     depends_on:
       - datadog-agent
     restart: always
 
   datadog-agent:
-    image: datadog/agent:7.32.3
+    image: datadog/dogstatsd:7.32.4
     ports:
       - '8125:8125'
     environment:
       DD_API_KEY: ${DD_API_KEY}
-      DD_LOGS_ENABLED: true
-      DD_PROCESS_AGENT_ENABLED: true
-      DD_RUNTIME_METRICS_ENABLED: true
-      DD_DOGSTATSD_NON_LOCAL_TRAFFIC: true
       DD_AGENT_HOST: datadog-agent
-      DD_HEALTH_PORT: 5555
-      DD_LOGS_CONFIG_CONTAINER_COLLECT_ALL: true
-      DD_LOGS_CONFIG_DOCKER_CONTAINER_USE_FILE: true
-      DD_CONTAINER_EXCLUDE: 'name:datadog-agent'
-      DD_DOGSTATSD_TAGS: 'service:ghdocs env:production'
-    volumes:
-      - /home/LogFiles:/var/lib/docker/containers:ro
-      - ${WEBAPP_STORAGE_HOME}/opt/datadog-agent/run:/opt/datadog-agent/run:rw
-      - /proc/:/host/proc/:ro
-      - /sys/fs/cgroup/:/host/sys/fs/cgroup:ro