Added note to 'ports' section: Port mapping is incompatible with network_mode: host

jgentes · joaofnfernandes · commit a8b93a59ea1b · 2018-04-16T13:57:53.000-07:00
Took a while to figure this one out. Source: docker/compose#4799 (comment)
diff --git a/compose/compose-file/index.md b/compose/compose-file/index.md
@@ -1380,6 +1380,8 @@ containers in the bare-metal machine's namespace and vise-versa.
 
 Expose ports.
 
+> **Note:** Port mapping is incompatible with `network_mode: host`
+
 #### Short syntax
 
 Either specify both ports (`HOST:CONTAINER`), or just the container
