Adds support for a memory flag to docker-compose build.

Signed-off-by: Samantha Miller <samantha.a.miller123@gmail.com>

contrib/completion/bash/docker-compose

@@ -120,7 +120,7 @@ _docker_compose_build() {
 
 	case "$cur" in
 		-*)
-			COMPREPLY=( $( compgen -W "--build-arg --force-rm --help --no-cache --pull" -- "$cur" ) )
+			COMPREPLY=( $( compgen -W "--build-arg --force-rm --help --memory --no-cache --pull" -- "$cur" ) )
 			;;
 		*)
 			__docker_compose_services_from_build

contrib/completion/zsh/_docker-compose

@@ -196,6 +196,7 @@ __docker-compose_subcommand() {
                 $opts_help \
                 "*--build-arg=[Set build-time variables for one service.]:<varname>=<value>: " \
                 '--force-rm[Always remove intermediate containers.]' \
+                '--memory[Memory limit for the build container.]' \
                 '--no-cache[Do not use cache when building the image.]' \
                 '--pull[Always attempt to pull a newer version of the image.]' \
                 '*:services:__docker-compose_services_from_build' && ret=0