engine: resources: Fix backwards docker ports

This wasn't setup properly, now it's fixed. Woops.

docs/resources.md

@@ -56,7 +56,7 @@ It has the following properties:
 * `image`: docker `image` or `image:tag`
 * `cmd`: a command or list of commands to run on the container
 * `env`: a list of environment variables, e.g. `["VAR=val",],`
-* `ports`: a map of portmappings, e.g. `{"tcp" => {80 => 8080, 443 => 8443,},},`
+* `ports`: a map of portmappings, e.g. `{"tcp" => {8080 => 80, 8443 => 443,},},`
 * `apiversion:` override the host's default docker version, e.g. `"v1.35"`
 * `force`: destroy and rebuild the container instead of erroring on wrong image