feat: create universal template (#3389)

universal/.codesandbox/tasks.json

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+{
+  // These tasks will run in order when initializing your CodeSandbox project.
+  "setupTasks": [],
+
+  // These tasks can be run from CodeSandbox. Running one will open a log in the app.
+  "tasks": {}
+}

universal/.codesandbox/template.json

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+{
+  "title": "Universal",
+  "description": "A starter that contains almost all programming languages",
+  "iconUrl": "https://raw.githubusercontent.com/codesandbox/sandbox-templates/main/universal/.codesandbox/icon.png",
+  "tags": ["containers", "universal"],
+  "published": true
+}

universal/.devcontainer/Dockerfile

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+# CodeSandbox supports debian & ubuntu based images
+FROM mcr.microsoft.com/devcontainers/base:ubuntu-22.04
+
+# Example; install htop by default
+RUN apt update -y && apt install -y htop
+
+# The project will be mounted in /workspace by default
+
+# Every new shell will open inside the built container
+
+# On top of this build, we install `zsh`, `git` and `docker` as additional
+# Docker layers.

universal/.devcontainer/devcontainer.json

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+{
+  "name": "Devcontainer",
+  "image": "ghcr.io/codesandbox/devcontainers/universal:latest"
+}

universal/README.md

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+# Universal Template
+
+This template is based on a forked version of the [Universal image](https://github.com/codesandbox/devcontainer-images/pkgs/container/devcontainers%2Funiversal) from the Devcontainers team.
+
+It contains almost all languages. It's the perfect starter for projects that can go in any direction.