Set up dev containers (#2605)

.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": ".NET / C# Development",
+	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
+	"image": "mcr.microsoft.com/devcontainers/dotnet:dev-7.0",
+
+	// Features to add to the dev container. More info: https://containers.dev/features.
+	"features": {
+		"ghcr.io/devcontainers/features/dotnet:2": "latest",
+	},
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [5000, 5001],
+	// "portsAttributes": {
+	//		"5001": {
+	//			"protocol": "https"
+	//		}
+	// }
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	"postCreateCommand": {
+		"packages": ".devcontainer/packages.sh",
+		"native": "dotnet tool restore && dotnet cake --target externals-download",
+		"tests": "dotnet build tests/SkiaSharp.Tests.Console.sln",
+	},
+
+	// Configure tool-specific properties.
+	"customizations": {
+		// Configure properties specific to VS Code.
+		"vscode": {
+			// Set *default* container specific settings.json values on container create.
+			"settings": {},
+			"extensions": [
+				"ms-dotnettools.csdevkit",
+			],
+		}
+	},
+
+	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+	// "remoteUser": "root"
+}

.devcontainer/packages.sh

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+#!/usr/bin/env bash
+set -e
+
+# Update APT package lists
+sudo apt update
+
+# Install FontConfig - this is a dependency of libSkiaSharp.so
+sudo apt install -y libfontconfig1
+
+# Install the Emoji fonts - for tests
+sudo apt install -y ttf-ancient-fonts
+
+# Install the Microsoft fonts (eg: Times New Roman) - for tests
+sudo apt install -y software-properties-common
+sudo apt-add-repository -y contrib
+sudo apt update
+# echo ttf-mscorefonts-installer msttcorefonts/accepted-mscorefonts-eula select true | sudo debconf-set-selections
+sudo apt install -y ttf-mscorefonts-installer

.vscode/settings.json

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+{
+    "dotnet.defaultSolution": "tests/SkiaSharp.Tests.Console.sln"
+}