Pass NFPM_PASSPHRASE into the container.

Author: jdoss

Makefile

@@ -146,6 +146,7 @@ release:
 	$Q @docker run --rm --privileged -e CGO_ENABLED=1 --env-file .release-env \
 		-e GORELEASER_KEY=$(GORELEASER_KEY) \
 		-e GPG_PRIVATE_KEY_FILE=$(GPG_PRIVATE_KEY_FILE) \
+		-e NFPM_PASSPHRASE=$(NFPM_PASSPHRASE) \
 		--entrypoint /go/src/$(PKG)/docker/build/entrypoint.sh \
 		-v ./$(GPG_PRIVATE_KEY_FILE):/$(GPG_PRIVATE_KEY_FILE) \
 		-v $(DOCKER_SOCK):/var/run/docker.sock \