[Modified/Added] Git-Page Theme Change And Navigation Link Added

sections/ec2_storage.md

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 - => Automate the creation, maintain, validate and test EC2 AMIs
 - Can be run on a schedule (weekly, whenever packages are updated, etc…)
 - Free service (only pay for the underlying resources)
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+* * *
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+[👈 EC2: Virtual Machines](./ec2.md)           [Home](../README.md)           [Elastic Load Balancing & Auto Scaling Groups 👉](./elb_asg.md)