Update server subcommands

abra

@@ -530,7 +530,11 @@ sub_cp() {
 ###### Subcommand `context`
 
 sub_server_init() {
-	load_context
+	export DOCKER_CONTEXT="$1"
+
+	if [ -n "$DOCKER_CONTEXT" ]; then
+		load_context
+	fi
 
 	docker swarm init || true
 	docker network create --driver=overlay proxy --scope swarm || true
@@ -562,6 +566,10 @@ sub_server_use() {
 	docker context use "$1"
 }
 
+sub_server_ls() {
+	docker context ls
+}
+
 sub_server() {
 	SUBCOMMAND2=$1
 	shift