added docker folder

.devcontainer/Dockerfile

@@ -0,0 +1,42 @@
+# See here for image contents: https://github.com/microsoft/vscode-dev-containers/tree/v0.231.6/containers/ubuntu/.devcontainer/base.Dockerfile
+
+# [Choice] Ubuntu version (use hirsuite or bionic on local arm64/Apple Silicon): hirsute, focal, bionic
+ARG VARIANT="focal"
+FROM mcr.microsoft.com/vscode/devcontainers/base:0-${VARIANT}
+
+# [Optional] Uncomment this section to install additional OS packages.
+# RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+#     && apt-get -y install --no-install-recommends <your-package-list-here>
+
+RUN sudo apt update && apt install -y curl zstd make jq
+
+RUN curl -sL --fail -H "Accept: application/vnd.github.v3+json" \
+    "https://api.github.com/repos/viciious/32XDK/releases/tags/20190504" \
+    | jq -r ".assets | .[] | select(.name | test(\"chillys-sega-devkit-20190504-opt.tar.zst$\")) | .url" \
+    | xargs curl -sL --fail -H "Accept: application/octet-stream" -O /dev/stdout | zstdcat | tar -C / -xa
+
+RUN sudo apt -y install file
+
+RUN sudo dpkg --add-architecture i386
+
+RUN sudo apt update
+
+RUN sudo apt install -y libx11-6:i386
+
+RUN sudo apt update
+
+RUN sudo apt -y install zlib1g:i386
+
+RUN sudo wget "http://ppa.launchpad.net/linuxuprising/libpng12/ubuntu/pool/main/libp/libpng/libpng12-0_1.2.54-1ubuntu1.1+1~ppa0~eoan_i386.deb"
+
+RUN sudo dpkg -i libpng12-0_1.2.54-1ubuntu1.1+1~ppa0~eoan_i386.deb
+
+RUN sudo apt update
+
+RUN sudo apt -y install lib32stdc++6
+
+COPY ["libpcm.a", "/opt/toolchains/sega/m68k-elf/lib/"]
+
+RUN sudo apt update
+
+RUN sudo apt -y install genisoimage

.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/microsoft/vscode-dev-containers/tree/v0.231.6/containers/ubuntu
+{
+	"name": "Ubuntu",
+	"build": {
+		"dockerfile": "Dockerfile",
+		// Update 'VARIANT' to pick an Ubuntu version: hirsute, focal, bionic
+		// Use hirsute or bionic on local arm64/Apple Silicon.
+		"args": { "VARIANT": "focal" }
+	},
+
+	// Set *default* container specific settings.json values on container create.
+	"settings": {},
+
+
+	// Add the IDs of extensions you want installed when the container is created in the array below.
+	"extensions": [
+		"ms-vscode.cpptools",
+		"steventattersall.m68k",
+		"ms-vscode.cpptools-extension-pack"
+	],
+
+	// 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": "uname -a",
+
+	// Comment out to connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
+	"remoteUser": "vscode",
+	"features": {
+		"git": "os-provided"
+	}
+
+}