doc: add brew install instructions

Author: starpit

README.md

@@ -8,6 +8,13 @@ CodeFlare is a framework to simplify the integration, scaling and
 acceleration of complex multi-step analytics and machine learning
 pipelines on the cloud.
 
+## Installation
+
+```shell
+brew tap project-codeflare/codeflare-cli https://github.com/project-codeflare/codeflare-cli
+brew install codeflare
+```
+
 ## License
 
 CodeFlare CLI is an open-source project with an [Apache 2.0 license](LICENSE).

bin/codeflare

@@ -121,7 +121,7 @@ do
     esac
 done
 
-if [ -n "$do_cli" ]; then
+if [ "$do_cli" = "1" ]; then
     # launch headless version; here, we use madwizard directly, but
     # using electron as the nodejs binary (this is what
     # ELECTRON_RUN_AS_NODE does for us)