Move all images into static folder

Delete images that are duplicated in static folder and update their references

Signed-off-by: Natalie Arellano <[email protected]>

Author: Natalie Arellano

content/docs/buildpacks-logo.svg

@@ -7,11 +7,11 @@ A `buildpack` is software that examines your source code and determines the best
 
 <!--more-->
 
-![buildpacks](/docs/for-app-developers/concepts/what.svg)
+![buildpacks](/images/what.svg)
 
 ## How do they work?
 
-![how](/docs/for-app-developers/concepts/how.svg)
+![how](/images/how.svg)
 
 **Each buildpack has two phases**
 

content/docs/for-app-developers/concepts/build.svg

@@ -12,7 +12,7 @@ a build-time base image, a [lifecycle] binary, and a reference to a runtime base
 
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-![create-builder diagram](/docs/for-platform-operators/concepts/create-builder.svg)
+![create-builder diagram](/images/create-builder.svg)
 
 ## Anatomy of a builder