feat(docker): official image with all runtime deps pre-installed (#198)

* feat(docker): official image with all runtime deps pre-installed

Multi-stage build using uv for the EvoScientist core + all messaging-channel
extras, plus Node.js 24 LTS (for npx-based MCP servers) and uv (for runtime
Python MCP installs) in the runtime layer. Runs as non-root user evosci,
with workspace, app data, and config (XDG_CONFIG_HOME) all consolidated
under a single /home/evosci/.evoscientist volume so a single mount
persists everything across container restarts.

Includes a docker-compose.yml starter, a build/push GitHub Actions
workflow targeting ghcr.io with multi-arch (amd64/arm64) and PR-only
build verification, a .dockerignore, and a new Docker section in the
README documenting mounts, derivation recipes for the unbundled stt /
oauth / TinyTeX extras, and proxy/cert handling expectations.

* fix(docker): pin trixie base + drop redundant python image

Switch builder and runtime from `python:3.11-slim-bookworm` to a single
`ghcr.io/astral-sh/uv:python3.11-trixie-slim` base — trixie drops several
CRITICAL vulnerabilities that bookworm carries today, and reusing the uv
image for runtime eliminates the separate `COPY --from=…/uv` line.

* chore(docker): pin GitHub Actions to commit SHAs in workflow

Replace mutable major-version tags with full commit SHAs (with the
corresponding semver tag in a trailing comment) so a compromised /
retagged action release can't silently change what runs in the publish
pipeline.

* chore(deps): enable Dependabot version updates for Dockerfile pins

Adds a weekly `docker` ecosystem that watches the Dockerfile's `FROM` /
`COPY --from=` references — including the ARG-bound `BASE_IMAGE` and
`NODE_IMAGE` digests — and opens one grouped PR per cadence bumping
both the @sha256 digest and the trailing version comment. This keeps
the otherwise-frozen pins flowing with Debian point releases and
upstream patches.

* fix(docker): use nodejs alias stage so NODE_IMAGE ARG actually resolves

`COPY --from=${NODE_IMAGE}` left the dollar-curly literal at parse time
under buildkit 29.x — it expands ARGs in `FROM` but reads `--from=` as a
static stage/image name. Introduce a tiny `FROM ${NODE_IMAGE} AS nodejs`
alias and `COPY --from=nodejs …` against it, which preserves the
ARG-driven Dependabot updates without tripping the parser.

* fix(docker): harden venv ownership and PATH ordering

- Drop `--chown` on the `/opt/venv` COPY so the venv stays root-owned.
  The runtime user only needs read+execute (default Unix perms allow
  that); making it user-owned let the agent rewrite its own
  dependencies, which defeats the sandboxing premise. All persistent
  agent state already lives under /home/evosci/.evoscientist/.
- Reorder PATH so /opt/venv/bin precedes the user-writable
  UV_TOOL_BIN_DIR. Otherwise a stray binary dropped into the latter
  (e.g. via `uv tool install`) could shadow the canonical
  `evosci` / `python` / `pip` shipped with the image.

* docs: update README

* docs(docker): warn about non-root UID and `curl | sh` for derived images

- The image runs as `evosci` (UID 1000), so a host-side `./workspace`
  bind mount fails if the host user has a different UID — same gotcha
  that bites onboarding's `mcp.yaml` write. Add an !IMPORTANT block
  with the two practical fixes (`chown -R 1000:1000` once, or
  `--user "$(id -u):$(id -g)"` on each run).
- The TinyTeX derivation snippet pipes an unpinned remote installer
  into `sh`. Add a one-line pointer to fetching a pinned release
  tarball from `rstudio/tinytex-releases` for users who'd rather not
  trust the upstream script blindly. The official installer is kept
  as the default since that's what TinyTeX itself recommends.

* chore(docker): cancel in-flight workflow runs + flag iMessage as host-only

- Add `concurrency: cancel-in-progress: true` to the docker workflow
  so successive pushes on the same ref supersede the prior run rather
  than queueing in parallel — multi-arch buildx is the slowest job in
  CI, no point burning minutes on superseded builds.
- Spell out that the docker image installs the `all-chanels` extra and
  call out iMessage as a deliberate host-only exclusion: it requires
  the `imsg` CLI bridging to macOS's Messages.app, which no Linux
  container config can satisfy.

.github/workflows/docker.yml

@@ -0,0 +1,67 @@
+name: Docker
+
+on:
+  push:
+    branches: ["main"]
+    tags: ["v*"]
+  pull_request:
+    paths:
+      - "Dockerfile"
+      - ".dockerignore"
+      - "pyproject.toml"
+      - "uv.lock"
+      - "EvoScientist/**"
+      - ".github/workflows/docker.yml"
+  workflow_dispatch:
+
+concurrency:
+  group: docker-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    timeout-minutes: 45
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd  # v5.0.1
+
+      - uses: docker/setup-qemu-action@c7c53464625b32c7a7e944ae62b3e17d2b600130  # v3.7.0
+      - uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f  # v3.12.0
+
+      - name: Log in to ${{ env.REGISTRY }}
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@c94ce9fb468520275223c153574b00df6fe4bcc9  # v3.7.0
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract image metadata
+        id: meta
+        uses: docker/metadata-action@c299e40c65443455700f0fdfc63efafe5b349051  # v5.10.0
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=raw,value=latest,enable={{is_default_branch}}
+
+      - name: Build and push
+        uses: docker/build-push-action@10e90e3645eae34f1e60eeb005ba3a3d33f178e8  # v6.19.2
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max