web: Makefile supports JITSI_MEET_VERSION

web/Makefile

@@ -1,4 +1,4 @@
 build:
-	docker build $(BUILD_ARGS) -t $(JITSI_REPO)/web .
+	docker build --build-arg JITSI_MEET_VERSION $(BUILD_ARGS) -t $(JITSI_REPO)/web .
 
 .PHONY: build