Github Codespace added (redcanaryco#2644)

* Create devcontainer.json

* devcontainers added

* devcontainers added

* add setup files

* Update README.md

.devcontainer/devcontainer.json

@@ -0,0 +1,26 @@
+{
+  "image": "mcr.microsoft.com/devcontainers/universal:2",
+  "features": {
+    "ghcr.io/devcontainers/features/powershell:1": {},
+    "ghcr.io/natescherer/devcontainers-custom-features/powershell-resources:1": {
+      "resources": "powershell-yaml,invoke-atomicredteam"
+    }
+  },
+  "remoteUser": "root",
+  "onCreateCommand": "pwsh /workspaces/atomic-red-team/.devcontainer/setup.ps1",
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "ms-vscode.powershell"
+      ],
+      "settings": {
+        "terminal.integrated.defaultProfile.linux": "pwsh",
+        "terminal.integrated.profiles.linux": {
+          "pwsh": {
+            "path": "/usr/bin/pwsh"
+          }
+        }
+      }
+    }
+  }
+}

.devcontainer/setup.ps1

@@ -0,0 +1,7 @@
+New-Item $PROFILE -Force
+Set-Variable -Name "InvokePath" -Value (Get-Item /usr/local/share/powershell/Modules/Invoke-AtomicRedTeam/**/Invoke-AtomicRedTeam.psd1).FullName
+Write-Output @"
+Import-Module $InvokePath -Force
+`$PSDefaultParameterValues`["Invoke-AtomicTest:PathToAtomicsFolder"] = "/workspaces/atomic-red-team/atomics";
+`$PSDefaultParameterValues`["Invoke-AtomicTest:ExecutionLogPath"]="$HOME/AtomicRedTeam/execution.csv";
+"@ > $PROFILE

README.md

@@ -51,3 +51,6 @@ becoming a contributor, check out these resources:
   for more information about contributing directly to this repository.
 - Check the [license](LICENSE.txt) for information regarding the distribution
   and modification of Atomic Red Team.
+- Contribute to linux atomics quickly from Github Codespaces. For more details, click [here](https://github.com/redcanaryco/atomic-red-team/wiki/Github-Codespaces)
+
+[![Open in GitHub Codespaces](https://github.com/codespaces/badge.svg)](https://codespaces.new/redcanaryco/atomic-red-team)