build: Load dockerfile Makefile, prevent ibc test cache

Makefile

@@ -245,7 +245,7 @@ format:
 
 # Build docker image and tag as kava/kava:local
 docker-build:
-	DOCKER_BUILDKIT=1 $(DOCKER) build -t kava/kava:local .
+	DOCKER_BUILDKIT=1 $(DOCKER) build -t kava/kava:local --load .
 
 docker-build-rocksdb:
 	DOCKER_BUILDKIT=1 $(DOCKER) build -f Dockerfile-rocksdb -t kava/kava:local .
@@ -302,8 +302,9 @@ test-e2e: docker-build
 	$(GO_BIN) test -failfast -count=1 -v ./tests/e2e/...
 
 # run interchaintest tests (./tests/e2e-ibc)
+# Use -count=1 to prevent caching, in case docker-build changes
 test-ibc: docker-build
-	cd tests/e2e-ibc && KAVA_TAG=local $(GO_BIN) test -timeout 10m .
+	cd tests/e2e-ibc && KAVA_TAG=local $(GO_BIN) test -timeout 10m -count=1 .
 .PHONY: test-ibc
 
 test: