docs: add local packaging screenshot to README

Add tag, gitea-release, and release targets to encode the corrected
versioning process (no v-prefix). VERSION is now overridable via the
command line for use in make release VERSION=x.y.z.

Makefile

@@ -1,9 +1,10 @@
 BIN := yoink
 BUILD_DIR := build
 REGISTRY := git.brizzle.dev/bryan/yoink-go
-VERSION := $(shell git describe --tags --always --dirty)
+VERSION ?= $(shell git describe --tags --always --dirty)
+NOTES ?= ""
 
-.PHONY: all windows linux darwin clean docker-build docker-push
+.PHONY: all windows linux darwin clean docker-build docker-push tag gitea-release release
 
 all: windows linux darwin
 
@@ -28,5 +29,28 @@ docker-push: docker-build
 	podman push $(REGISTRY):$(VERSION)
 	podman push $(REGISTRY):latest
 
+tag:
+	@if [ -z "$(VERSION)" ]; then echo "Usage: make tag VERSION=1.2.0"; exit 1; fi
+	git tag $(VERSION)
+	git push origin $(VERSION)
+
+gitea-release:
+	tea release create \
+		--tag $(VERSION) \
+		--title "$(VERSION)" \
+		--note $(NOTES) \
+		--asset $(BUILD_DIR)/$(BIN)-windows-amd64.exe \
+		--asset $(BUILD_DIR)/$(BIN)-linux-amd64 \
+		--asset $(BUILD_DIR)/$(BIN)-linux-arm64 \
+		--asset $(BUILD_DIR)/$(BIN)-darwin-amd64 \
+		--asset $(BUILD_DIR)/$(BIN)-darwin-arm64
+
+release:
+	@if [ -z "$(VERSION)" ]; then echo "Usage: make release VERSION=1.3.0 NOTES='...'"; exit 1; fi
+	$(MAKE) tag VERSION=$(VERSION)
+	$(MAKE) clean all
+	$(MAKE) gitea-release VERSION=$(VERSION) NOTES=$(NOTES)
+	$(MAKE) docker-push VERSION=$(VERSION)
+
 clean:
 	rm -rf $(BUILD_DIR)

README.md

@@ -99,6 +99,8 @@ The web UI is then available at `http://localhost:8080`.
 
 #### Packaging local images
 
+![Local packaging panel](Screenshot_02.png)
+
 Click the upload icon (↑) in the header to open the packaging panel. Enter a title, then either:
 
 - **Drag and drop** a folder or image files onto the drop zone