title: asp.net core docker image "aspnet:2.2-stretch-slim"
body: <p>I recently created a new asp.net core 2.2 project and while making changes to the dockerfile I noticed the visual studio template used a new base image that I am unfamiliar with and unable to find documentation on. Can someone explain what this "stretch-slim" image is and how it differs from the aspnet image I expected to see?</p>
  
  <p><strong>Actual</strong></p>
  
  <pre><code>FROM mcr.microsoft.com/dotnet/core/aspnet:2.2-stretch-slim AS base
  WORKDIR /app
  EXPOSE 80
  FROM microsoft/dotnet:2.2-sdk AS build
  </code></pre>
  
  <p><strong>Expected</strong></p>
  
  <pre><code>FROM mcr.microsoft.com/dotnet/core/aspnet:2.2 AS base
  WORKDIR /app
  EXPOSE 80
  FROM microsoft/dotnet:2.2-sdk AS build
  </code></pre>