Introduce Makefile

Makefile

@@ -0,0 +1,9 @@
+.PHONY: default rest-server clean
+
+default: rest-server
+
+rest-server:
+	go run build.go
+
+clean:
+	rm -f rest-server

README.md

@@ -29,10 +29,10 @@ repository directory:
 
 ### From source
 
-Run ```go run build.go```, afterwards you'll find the binary in the current directory.  You can move it anywhere you
+Run ```make```, afterwards you'll find the binary in the current directory.  You can move it anywhere you want.  There's
-want.  There's also an [example systemd service
+also an [example systemd service file](https://github.com/restic/rest-server/blob/master/etc/rest-server.service)
-file](https://github.com/restic/rest-server/blob/master/etc/rest-server.service) included, so you can get it up &
+included, so you can get it up & running as a proper service in no time.  Of course, you can also test it from the
-running as a proper service in no time.  Of course, you can also test it from the command line.
+command line.
 
 ```
 % go run build.go