Updated docker file to run on local architecture (Azure-Samples#118)

## Purpose
The DevContainer was hard coded to use the AMD64 base image which meant
it ran emulated on ARM devices. Now it runs on the native architecture
of the machine it is running on which makes it faster and solves
potential compatibility issues running under the Docker QEMU emulator.

## Does this introduce a breaking change?
[ ] Yes
[X ] No


## Pull Request Type
What kind of change does this Pull Request introduce?

[X ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[ ] Other... Please describe:
```

## How to Test
*  Get the code

```
git clone [repo-address]
cd [repo-name]
git checkout [branch-name]
npm install
```

* Test the code
<!-- Add steps to run the tests suite and/or manually test -->
```
```

## What to Check
Verify that the following are valid
* ...

## Other Information
<!-- Add any other helpful information that may be needed here. -->

---------

Co-authored-by: Scott Hunter <[email protected]>

Author: coolcsh

.devcontainer/Dockerfile

@@ -1,23 +1,11 @@
 {
     "name": "Azure Developer CLI",
-    "build": {
-        "dockerfile": "Dockerfile",
-        "args": {
-            "IMAGE": "dotnet",
-            "VERSION": "7.0",
-            "VARIANT": "bullseye"
-        }
-    },
+    "image": "mcr.microsoft.com/devcontainers/dotnet:0-7.0-bullseye",
     "features": {
         "ghcr.io/devcontainers/features/docker-in-docker:2": {},
-        "ghcr.io/devcontainers/features/kubectl-helm-minikube:1": {
-            "version": "latest",
-            "helm": "latest",
-            "minikube": "none"
-        },
-        "ghcr.io/devcontainers/features/powershell:1.1.0": {},
-        "ghcr.io/devcontainers/features/azure-cli:1.0.8": {},
-        "ghcr.io/devcontainers/features/github-cli:1.0.10": {}
+        "ghcr.io/devcontainers/features/azure-cli:1.1.0": {},
+        "ghcr.io/devcontainers/features/github-cli:1.0.9": {},
+        "ghcr.io/azure/azure-dev/azd:latest": {}
     },
     "customizations": {
         "vscode": {