Update Makefile

adding `-f Containerfile`  because docker now doesn't support "Containerfile" as a default.

Author: langdon

Makefile

@@ -3,7 +3,7 @@
 IMAGE_NAME ?= bu-spark
 
 build:
-	docker build -t $(IMAGE_NAME) .
+	docker build -t $(IMAGE_NAME) -f Containerfile .
 
 run:
 	docker rm $(IMAGE_NAME) || true
@@ -20,4 +20,4 @@ build-nocache:
 	docker build --no-cache -t $(IMAGE_NAME) .
 
 build-nocache-podman:
-	podman build --no-cache -t $(IMAGE_NAME) .
+	podman build --no-cache -t $(IMAGE_NAME) .