prepare Makefile for AppDir deploy

Makefile

@@ -2,9 +2,12 @@ all: package
 
 package: target/release/upend ui/dist/index.html
 	rm -fr dist
-	mkdir dist
-	cp target/release/upend dist/upend
-	cp -r ui/dist dist/webui
+	linuxdeploy-x86_64.AppImage --appdir dist
+	cp target/release/upend dist/usr/bin/upend
+	cp -r ui/dist dist/usr/bin/webui
+	cp upend.png dist/usr/share/icons/upend.png
+	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
 

upend.desktop

@@ -0,0 +1,8 @@
+[Desktop Entry]
+Version=1.0
+Type=Application
+Categories=Utility
+Terminal=false
+Exec=upend
+Name=UpEnd
+Icon=upend