adding #contributions header to global README.md (#188)

README.md

@@ -51,3 +51,15 @@ Your feedback is always welcome.
 [kccna18-event]: https://kccna18.sched.com/event/GrXC/on-the-oss-path-to-full-observability-with-grafana-david-kaltschmidt-grafana-labs
 [kccna18-slides]: https://speakerdeck.com/davkal/on-the-path-to-full-observability-with-oss-and-launch-of-loki
 [kccna18-video]: https://www.youtube.com/watch?v=U7C5SpRtK74&list=PLj6h78yzYM2PZf9eA7bhWnIh_mK1vyOfU&index=346
+
+## Contributing
+
+For now, you need to add your fork as a remote on the original **$GOPATH**/src/github.com/grafana/loki clone, so:
+
+```bash
+
+$ go get github.com/grafana/loki
+$ cd $GOPATH/src/github.com/grafana/loki # GOPATH is $HOME/go by default.
+
+$ git remote add <FORK_NAME> <FORK_URL>
+```