Add bash completion for stack deploy --resolve-image

Also adds minimal documentation for this flag.

Signed-off-by: Harald Albers <github@albersweb.de>

contrib/completion/bash/docker

@@ -4346,16 +4346,20 @@ _docker_stack_deploy() {
 			_filedir yml
 			return
 			;;
+		--resolve-image)
+			COMPREPLY=( $( compgen -W "always changed never" -- "$cur" ) )
+			return
+			;;
 	esac
 
 	case "$cur" in
 		-*)
-			local options="--compose-file -c --help --prune --with-registry-auth"
+			local options="--compose-file -c --help --prune --resolve-image --with-registry-auth"
 			__docker_daemon_is_experimental && options+=" --bundle-file"
 			COMPREPLY=( $( compgen -W "$options" -- "$cur" ) )
 			;;
 		*)
-			local counter=$(__docker_pos_first_nonflag '--compose-file|-c|--bundle-file')
+			local counter=$(__docker_pos_first_nonflag '--bundle-file|--compose-file|-c|--resolve-image')
 			if [ "$cword" -eq "$counter" ]; then
 				__docker_complete_stacks
 			fi

docs/reference/commandline/stack_deploy.md

@@ -24,11 +24,12 @@ Aliases:
   deploy, up
 
 Options:
-      --bundle-file string    Path to a Distributed Application Bundle file
-  -c, --compose-file string   Path to a Compose file
-      --help                  Print usage
-      --prune                 Prune services that are no longer referenced
-      --with-registry-auth    Send registry authentication details to Swarm agents
+      --bundle-file string     Path to a Distributed Application Bundle file
+  -c, --compose-file string    Path to a Compose file
+      --help                   Print usage
+      --prune                  Prune services that are no longer referenced
+      --resolve-image string   Query the registry to resolve image digest and supported platforms ("always"|"changed"|"never") (default "always")
+      --with-registry-auth     Send registry authentication details to Swarm agents
 ```
 
 ## Description