## New Template: docker-rstudio
Adds a Docker-based template for R development workspaces.
### What it provides
| Tool | Source | Access |
|------|--------|--------|
| **RStudio Server** | Pre-installed in `rocker/rstudio` image | Browser
via Coder proxy (subdomain) |
| **code-server** | `registry.coder.com/coder/code-server/coder` module
| Browser via Coder proxy |
| **RMarkdown** | Installed on first start, persisted in home-dir R
library | Available in both RStudio and code-server |
### Design decisions
<details>
<summary>Click to expand</summary>
- **`rocker/rstudio` as the base image** instead of
`codercom/enterprise-base:ubuntu` + the `rstudio-server` module. The
module runs RStudio inside a nested Docker container which requires
Docker-in-Docker or socket mounting in the workspace. Using the rocker
image directly avoids that complexity and starts faster since R and
RStudio are already installed.
- **Direct `coder_app` for RStudio** rather than the registry
`rstudio-server` module, because the module is designed for Docker-based
provisioning (it pulls and runs a rocker container). Since the workspace
itself _is_ the rocker container, RStudio Server is started natively via
`rserver`.
- **RMarkdown installed idempotently** — the startup script checks
`require('rmarkdown')` before installing. Since R libraries default to a
subdirectory under `/home/rstudio` (the persistent volume), packages
survive workspace restarts.
- **Persistent volume mounted at `/home/rstudio`** to match the default
user in the rocker image.
- **`--auth-none=1`** disables RStudio authentication since the Coder
proxy handles access control.
</details>
### Files added
- `registry/coder/templates/docker-rstudio/main.tf`
- `registry/coder/templates/docker-rstudio/README.md`
### Validation
- `go run ./cmd/readmevalidation/` — passes (32 templates detected)
- `terraform fmt` — clean
- `bun run fmt` — all files unchanged
---------
Co-authored-by: DevCats <christofer@coder.com>
Co-authored-by: blink-so[bot] <211532188+blink-so[bot]@users.noreply.github.com>
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