Update release script to build/distribute backend

Makefile

@@ -15,7 +15,7 @@ build-server:
 	cd server && CGO_ENABLED=0 go build -mod=vendor -v -o bin/server ./cmd/server
 
 clean:
-	rm -rf dist
+	rm -rf client/dist server/bin release
 
 dokku-build:
 	docker build \
@@ -27,4 +27,8 @@ dokku-run:
 
 dokku-deploy:
 	$(if $(shell git config remote.dokku.url),, git remote add dokku $(DOKKU_URL))
-	git push -f dokku $(shell git rev-parse HEAD):refs/heads/master
+	git push -f dokku $(shell git rev-parse HEAD):refs/heads/master
+
+.PHONY: release
+release: clean
+	@misc/script/release.sh