Update readme.md for AMS deplyoment

[mhaack]

Description

Update readme.md for AEM deployment

Related Issue

CMGR-10910

Motivation and Context

Clarify different deployment patterns for on-prem AEM and AMS AEM.

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [x] Documentation

Checklist:

• [x] I have signed the Adobe Open Source CLA.
• [ ] My change requires a change to the documentation.
• [x] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes and the overall coverage did not decrease.
• [ ] All unit tests pass on CircleCi.
• [ ] I ran all tests locally and they pass.

[codecov[bot]]

Codecov Report

Merging #120 into master will decrease coverage by 0.28%. The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #120      +/-   ##
============================================
- Coverage     88.05%   87.77%   -0.29%     
  Complexity      448      448              
============================================
  Files            34       34              
  Lines          1783     1783              
  Branches        274      274              
============================================
- Hits           1570     1565       -5     
- Misses           88       93       +5     
  Partials        125      125              

Flag	Coverage Δ	Complexity Δ
#integration	51.96% <ø> (ø)	249.00 <ø> (ø)
#karma	92.71% <ø> (-3.32%)	0.00 <ø> (ø)
#unittests	83.94% <ø> (ø)	432.00 <ø> (ø)

Impacted Files	Coverage Δ	Complexity Δ
...omponents/common/cifpicker/clientlibs/cifpicker.js	80.00% <0.00%> (-11.12%)	0.00% <0.00%> (ø%)

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