Create Dev Container

Create a dev container spec. This allows users to create Codespaces directly on GitHub, or to use VS Code and the Dev Containers plug-in to have a pre-configured container automatically created that is ready to develop in.

.devcontainer/devcontainer.json

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+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/dotnet
+{
+	"name": "C# (.NET)",
+	"image": "mcr.microsoft.com/devcontainers/dotnet:0-6.0",
+	"features": {
+		"ghcr.io/devcontainers/features/github-cli:1": {},
+		"ghcr.io/dhoeric/features/act:1": {},
+		"ghcr.io/devcontainers/features/dotnet:1": {
+			"version": "7"
+		}
+	},
+	"customizations": {
+		"vscode": {
+			"extensions": [
+				"ms-dotnettools.csharp",
+				"k--kato.docomment",
+				"formulahendry.dotnet-test-explorer",
+				"leo-labs.dotnet",
+				"github.vscode-pull-request-github"
+			]
+		}
+	}
+
+	// Features to add to the dev container. More info: https://containers.dev/features.
+	// "features": {},
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [5000, 5001],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	// "postCreateCommand": "dotnet restore",
+
+	// Configure tool-specific properties.
+	// "customizations": {},
+
+	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+	// "remoteUser": "root"
+}