Version 20210119.20 Release

Changes:

01
- No longer need to select "Hot" access tier
02
- No longer need to select "Hot" access tier
- Fix "Echo.cs" with "GetSettingInfo.cs" in Ex 5, Task 3, Step 12
- Add "force" flag to "func init" command
03
- No longer need to select "Hot" access tier
- Update storage demo to use v12 of Azure Storage SDK
04
- Storage account bacpac instructions unclear
- Firewall setup instructions (and more)
- Clarification on server resource name
05
- Update Dockerfile to .NET Core 3.1 (PR is incorrect)
- Check if Bash shell is used
06
- Terminology change
- Update Azure AD UI instructions
07
- Correct resource group name from "Serverless" to "ConfidentialStack"
- Correct filename from "Echo.cs to "FileParser.cs"
- Fix spelling for "sae" to "save"
- Remove the step to disable soft delete
09
- Updated request URl instructions
10
- Change terminology from "app" to "subscription" and "topic"
11
- Encode as Base64 before sending to queue