Update installation.md
Update installation.md

Banjot added some changes to the language around use of SANs. We have to be clear that the SAN can be either a private or public IP, it all depends on what URL they type in their browser to connect to their UCP controller. In most cases, I will expect customers will use private IP addresses or a private IP network they create on AWS. Most will not expose UCP to public IP addresses since UCP is likely not a public-facing service, it's an internal Ops service. Pubic IPs are what allows AWS instances to talk to each other but it's not how most users will configure their IP networking on AWS for a UCP deployment that's internal to their organization.
Enter Evan's comments

Signed-off-by: Mary Anthony <5665331b9b819ac358165f8c38970dc8c7ddb47d@docker.com>

gdevillele/docker.github.io,shubheksha/docker.github.io,joaofnfernandes/docker.github.io,docker/docker.github.io,bdwill/docker.github.io,thaJeztah/docker.github.io,LuisBosquez/docker.github.io,anweiss/docker.github.io,denverdino/docker.github.io,BSWANG/denverdino.github.io,aduermael/docker.github.io,docker/docker.github.io,sanscontext/docker.github.io,anweiss/docker.github.io,joeuo/docker.github.io,gdevillele/docker.github.io,shubheksha/docker.github.io,phiroict/docker,jzwlqx/denverdino.github.io,shin-/docker.github.io,joeuo/docker.github.io,phiroict/docker,BSWANG/denverdino.github.io,troy0820/docker.github.io,bdwill/docker.github.io,johnstep/docker.github.io,londoncalling/docker.github.io,gdevillele/docker.github.io,menglingwei/denverdino.github.io,joaofnfernandes/docker.github.io,bdwill/docker.github.io,joeuo/docker.github.io,joaofnfernandes/docker.github.io,docker-zh/docker.github.io,troy0820/docker.github.io,joeuo/docker.github.io,denverdino/docker.github.io,BSWANG/denverdino.github.io,joaofnfernandes/docker.github.io,phiroict/docker,alexisbellido/docker.github.io,docker-zh/docker.github.io,jzwlqx/denverdino.github.io,alexisbellido/docker.github.io,LuisBosquez/docker.github.io,LuisBosquez/docker.github.io,docker-zh/docker.github.io,aduermael/docker.github.io,londoncalling/docker.github.io,shubheksha/docker.github.io,jzwlqx/denverdino.github.io,menglingwei/denverdino.github.io,alexisbellido/docker.github.io,denverdino/denverdino.github.io,jzwlqx/denverdino.github.io,menglingwei/denverdino.github.io,bdwill/docker.github.io,londoncalling/docker.github.io,johnstep/docker.github.io,sanscontext/docker.github.io,joaofnfernandes/docker.github.io,menglingwei/denverdino.github.io,docker/docker.github.io,docker/docker.github.io,shin-/docker.github.io,sanscontext/docker.github.io,docker-zh/docker.github.io,docker/docker.github.io,gdevillele/docker.github.io,denverdino/denverdino.github.io,alexisbellido/docker.github.io,denverdino/denverdino.github.io,joeuo/docker.github.io,troy0820/docker.github.io,thaJeztah/docker.github.io,johnstep/docker.github.io,johnstep/docker.github.io,shin-/docker.github.io,gdevillele/docker.github.io,bdwill/docker.github.io,jzwlqx/denverdino.github.io,BSWANG/denverdino.github.io,anweiss/docker.github.io,thaJeztah/docker.github.io,denverdino/docker.github.io,alexisbellido/docker.github.io,sanscontext/docker.github.io,denverdino/denverdino.github.io,denverdino/docker.github.io,BSWANG/denverdino.github.io,menglingwei/denverdino.github.io,docker-zh/docker.github.io,thaJeztah/docker.github.io,LuisBosquez/docker.github.io,denverdino/docker.github.io,johnstep/docker.github.io,anweiss/docker.github.io,JimGalasyn/docker.github.io,anweiss/docker.github.io,shubheksha/docker.github.io,shin-/docker.github.io,aduermael/docker.github.io,JimGalasyn/docker.github.io,troy0820/docker.github.io,JimGalasyn/docker.github.io,phiroict/docker,phiroict/docker,sanscontext/docker.github.io,londoncalling/docker.github.io,shubheksha/docker.github.io,JimGalasyn/docker.github.io,denverdino/denverdino.github.io,thaJeztah/docker.github.io,LuisBosquez/docker.github.io,shin-/docker.github.io,JimGalasyn/docker.github.io,londoncalling/docker.github.io,aduermael/docker.github.io