ci: make makefile more command-y

Makefile

@@ -1,4 +1,4 @@
-all: backend frontend
+all: target/release/upend webui/dist
 
 package: all
 	rm -fr dist
@@ -9,18 +9,23 @@ package: all
 	VERSION="$$(grep '^version' Cargo.toml|grep -Eo '[0-9]+\.[0-9]+\.[0-9]+')" \
 		linuxdeploy-x86_64.AppImage --appdir dist -d upend.desktop --output appimage
 
-backend: target/release/upend
-
-target/release/upend:
+backend:
 	cargo build --release
 
-tools/upend_js/index.js:
+frontend: tools/upend_js/index.js
+	cd webui && yarn add ../tools/upend_js && yarn install --immutable && yarn build
+
+jslib:
 	cd tools/upend_js && yarn install --immutable && yarn build
 
-frontend: webui/dist
+target/release/upend:
+	make backend
 
-webui/dist: tools/upend_js/index.js
-	cd webui && yarn add ../tools/upend_js && yarn install --immutable && yarn build
+webui/dist:
+	make frontend
+
+tools/upend_js/index.js:
+	make jslib
 
 lint: backend_lint frontend_lint