Fix & expand contributing section in README

Follows-Up: Id857e3c1389b6c729c8931da149af58740f62896
Change-Id: I9f01b924a9ec2e0eee845383d04f390169eb6b87

README.md

@@ -12,11 +12,15 @@ docker-compose development environment, with subcommands provided under the
 ## Contributing
 
 Clone this repository to your `$GOPATH` (probably `~/go`), so it would be at
-`~/go/src/cli`.
+`~/go/src/gerrit.wikimedia.org/r/mediawiki/tools/cli`.
 
-In the `cli` directory run `go get` to download go package dependencies.
+In the `~/go/src/gerrit.wikimedia.org/r/mediawiki/tools/cli/cmd` directory run `go get` to download go package dependencies.
 
-Execute the script with `go run ~/go/src/cli/main.go`
+Execute the script with `go run ~/go/src/gerrit.wikimedia.org/r/mediawiki/tools/cli/cmd/cli/main.go`
+
+In order to run the script within the MediaWiki directory you'll need to install it `make install`
+
+And then run the build binary `~/go/src/gerrit.wikimedia.org/r/mediawiki/tools/cli/bin/mw`
 
 ## Support