Add initial devcontainer

Author: 31ch

.devcontainer/Dockerfile

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+FROM mcr.microsoft.com/devcontainers/python:1-3.12-bullseye
+
+# Install Debian packages
+# RUN apt-get update && apt-get install -y --no-install-recommends \
+#     XXX \
+#     && apt-get autoremove -y && apt-get clean -y && rm -rf /var/lib/apt/lists/*

.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/python
+{
+	"name": "Python 3",
+	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
+	//"image": "mcr.microsoft.com/devcontainers/python:1-3.12-bullseye"
+	"build": {
+        // Path is relative to the devcontainer.json file.
+        "dockerfile": "Dockerfile"
+    }
+
+	// 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": [],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	// "postCreateCommand": "pip3 install --user -r requirements.txt",
+
+	// Configure tool-specific properties.
+	// "customizations": {},
+
+	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+	// "remoteUser": "root"
+}