Updated the cloud9-startup.sh to download and install latest version … (#511)

* Updated the cloud9-startup.sh to download and install latest version of eksctl
Updated the yelb-appserver-v2/Dockerfile charging the gem install flag from  --no-ri --no-rdoc  to --no-document, installed  zlib1g , zlib1g-dev and puma packages

* Removed the change log as per the review comments

Co-authored-by: EC2 Default User <[email protected]>

Author: desaiajayhnr

walkthroughs/eks-getting-started/cloud9-startup.sh

@@ -14,7 +14,7 @@ pip3 install awscli --upgrade --user
 source ~/.bash_profile
 
 # Install eksctl
-curl --silent --location "https://github.com/weaveworks/eksctl/releases/download/0.19.0-rc.1/eksctl_Linux_amd64.tar.gz" | tar xz -C /tmp
+curl --silent --location "https://github.com/weaveworks/eksctl/releases/latest/download/eksctl_$(uname -s)_amd64.tar.gz" | tar xz -C /tmp
 sudo mv /tmp/eksctl /usr/local/bin
 
 # Install kubectl

walkthroughs/eks-getting-started/yelb-appserver-v2/Dockerfile

@@ -14,15 +14,16 @@ ENV LANG=en_us.UTF-8
 ENV LC_ALL=C.UTF-8
 ENV RACK_ENV=production
 
-RUN gem install sinatra --no-ri --no-rdoc
-RUN gem install redis --no-ri --no-rdoc
+RUN gem install sinatra --no-document
+RUN gem install redis --no-document
 ### hack to allow the setup of the pg gem (which would fail otherwise)
 RUN apt-get update
-RUN apt-get install libpq-dev -y
+RUN apt-get install libpq-dev zlib1g zlib1g-dev -y
 ### end of hack (this would require additional research and optimization)
-RUN gem install pg --no-ri --no-rdoc
+RUN gem install pg --no-document
 ### this installs the AWS SDK for DynamoDB (so that appserver can talk to DDB Vs the default Postgres/Redis)
-RUN gem install aws-sdk-dynamodb pg --no-ri --no-rdoc
+RUN gem install aws-sdk-dynamodb pg puma --no-document
+
 # Set the working directory to /
 WORKDIR /
 ADD startup.sh startup.sh