feat: add docker-envbuilder and tasks-docker templates to coder namespace

registry/coder/templates/docker-envbuilder/README.md

@@ -0,0 +1,76 @@
+---
+display_name: Docker (Envbuilder)
+description: Provision envbuilder containers as Coder workspaces
+icon: ../../../../.icons/docker.svg
+verified: true
+tags: [container, docker, devcontainer, envbuilder]
+---
+
+# Remote Development on Docker Containers (with Envbuilder)
+
+Provision Envbuilder containers based on `devcontainer.json` as [Coder workspaces](https://coder.com/docs/workspaces) in Docker with this example template.
+
+## Prerequisites
+
+### Infrastructure
+
+Coder must have access to a running Docker socket, and the `coder` user must be a member of the `docker` group:
+
+```shell
+# Add coder user to Docker group
+sudo usermod -aG docker coder
+
+# Restart Coder server
+sudo systemctl restart coder
+
+# Test Docker
+sudo -u coder docker ps
+```
+
+## Architecture
+
+Coder supports Envbuilder containers based on `devcontainer.json` via [envbuilder](https://github.com/coder/envbuilder), an open source project. Read more about this in [Coder's documentation](https://coder.com/docs/templates/dev-containers).
+
+This template provisions the following resources:
+
+- Envbuilder cached image (conditional, persistent) using [`terraform-provider-envbuilder`](https://github.com/coder/terraform-provider-envbuilder)
+- Docker image (persistent) using [`envbuilder`](https://github.com/coder/envbuilder)
+- Docker container (ephemeral)
+- Docker volume (persistent on `/workspaces`)
+
+The Git repository is cloned inside the `/workspaces` volume if not present.
+Any local changes to the Devcontainer files inside the volume will be applied when you restart the workspace.
+Keep in mind that any tools or files outside of `/workspaces` or not added as part of the Devcontainer specification are not persisted.
+Edit the `devcontainer.json` instead!
+
+> **Note**
+> This template is designed to be a starting point! Edit the Terraform to extend the template to support your use case.
+
+## Docker-in-Docker
+
+See the [Envbuilder documentation](https://github.com/coder/envbuilder/blob/main/docs/docker.md) for information on running Docker containers inside an Envbuilder container.
+
+## Caching
+
+To speed up your builds, you can use a container registry as a cache.
+When creating the template, set the parameter `cache_repo` to a valid Docker repository.
+
+For example, you can run a local registry:
+
+```shell
+docker run --detach \
+  --volume registry-cache:/var/lib/registry \
+  --publish 5000:5000 \
+  --name registry-cache \
+  --net=host \
+  registry:2
+```
+
+Then, when creating the template, enter `localhost:5000/envbuilder-cache` for the parameter `cache_repo`.
+
+See the [Envbuilder Terraform Provider Examples](https://github.com/coder/terraform-provider-envbuilder/blob/main/examples/resources/envbuilder_cached_image/envbuilder_cached_image_resource.tf/) for a more complete example of how the provider works.
+
+> [!NOTE]
+> We recommend using a registry cache with authentication enabled.
+> To allow Envbuilder to authenticate with the registry cache, specify the variable `cache_repo_docker_config_path`
+> with the path to a Docker config `.json` on disk containing valid credentials for the registry.