improve makefile

Makefile

@@ -1,13 +1,35 @@
-dev:
-	@go tool templ generate
-	@go run . -addr=":6969" -max-size=32768
+ADDR_BUILD := ":3000"
+ADDR_DEV := ":6969"
 
+MAX_SIZE := 32768
+
+BUILD_DIR := target
+APP_NAME := pastebin
+
+.PHONY: default
+default: dev
+
+.PHONY: dev
+dev:
+	@go run . -addr="$(ADDR_DEV)" -max-size=$(MAX_SIZE)
+
+.PHONY: gen
 gen:
 	@go tool templ generate
 
+.PHONY: test
 test:
 	@go test -v ./...
 
-run:
-	@go build .
-	@./pastebin -addr=:3000 -max-size=32768
+.PHONY: build
+build: gen
+	@mkdir -p $(BUILD_DIR)
+	@go build -o $(BUILD_DIR)/$(APP_NAME) .
+
+.PHONY: run
+run: build
+	@$(BUILD_DIR)/$(APP_NAME) -addr=$(ADDR_BUILD) -max-size=$(MAX_SIZE)
+
+.PHONY: clean
+clean:
+	@rm -rf $(BUILD_DIR)