Add Makefile with deploy target

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Makefile

@@ -0,0 +1,20 @@
+DEST       ?= /srv/task-inventory
+OWNER      ?= task-inventory:task-inventory
+OWNER_USER  = $(firstword $(subst :, ,$(OWNER)))
+
+RSYNC_EXCLUDES := \
+	--exclude='/.git/' \
+	--exclude='/data/' \
+	--exclude='/config.yaml' \
+	--exclude='/node_modules/'
+
+.PHONY: deploy sync
+
+# Full deployment: sync files, fix ownership, install dependencies
+deploy: sync
+	sudo chown -R $(OWNER) $(DEST)
+	sudo -u $(OWNER_USER) npm ci --prefix $(DEST)
+
+# Copy files only — useful for quick updates when dependencies haven't changed
+sync:
+	sudo rsync -a --delete $(RSYNC_EXCLUDES) ./ $(DEST)/