Add 2x blog posts

- Top 5 tips and tricks for boosting productivity with the
OpenFaaS CLI
- Multi-stage Serverless on Kubernetes with OpenFaaS and GKE

Signed-off-by: Alex Ellis (VMware) <alexellis2@gmail.com>

community.md

@@ -96,6 +96,8 @@ Key:
 
 | Blog/repo name and description                                          | Author       | Site     | Date        |
 |---------------------------------------------------------------------|--------------|----------|-------------|
+| [5 tips and tricks for the OpenFaaS CLI](https://www.openfaas.com/blog/five-cli-tips/) | Alex Ellis | openfaas.com | 21-Aug-2018 |
+| [Multi-stage Serverless on Kubernetes with OpenFaaS and GKE](https://www.openfaas.com/blog/gke-multi-stage/) | Stefan Prodan | openfaas.com | 14-Aug-2018 |
 | [Managing state for Serverless Functions with Minio](https://blog.lapw.at/stateful-serverless-stack-openfaas-minio/) | Quentin Lapointe | lapw.at | 16-Aug-2018 | 
 | [Monitor Arista Cloud vision network devices with OpenFaaS](https://github.com/burnyd/cvp-serverless-openfaas) | Daniel Hertzberg | github.com | 13-Aug-2018 |
 | [Serverless email sender using OpenFaaS and .NET Core](https://medium.com/@paulius.juozelskis/serverless-email-sender-using-openfaas-and-net-core-afdef152359) | Paulius Juozelskis | medium.com | 13-Aug-2018 |