feat: add Docker support for self-hosted deployment

.dockerignore

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+# Build artifacts
+/target/
+debug/
+**/*.d
+**/*.rlib
+**/*.dll
+**/*.dylib
+**/*.so
+
+# Git
+.git/
+.gitignore
+
+# Docs (VitePress — not needed in image)
+docs/
+
+# Vendored
+vendored/
+
+# Tests & benchmarks
+tests/
+bench/
+
+# CI/CD
+.github/
+.woodpecker.yml
+
+# Environment & secrets
+.env
+.env.*
+!.env.example
+
+# Editor
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Docker
+Dockerfile
+docker-compose.yml
+.dockerignore

.woodpecker.yml

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+# Woodpecker CI for Cora Code.
+#
+# Pipeline:
+#   1. Rust check / fmt / clippy / test — every push + PR.
+#   2. On push to develop OR a tag → build Docker image and push to Zot.
+#
+# Image tags (via auto_tag):
+#   - push to develop → :develop + :sha-<short>
+#   - tag v1.2.3      → :vX.Y.Z + :latest
+#
+# Required Woodpecker secrets (set in ci.ajianaz.dev → repo settings):
+#   ZOT_USER — registry account with push permission
+#   ZOT_PASS — registry password / token
+#
+# Required server config (Woodpecker admin, one-time):
+#   woodpeckerci/plugin-docker-buildx:5 must be in WOODPECKER_PLUGINS_PRIVILEGED
+#   (Docker-in-Docker needs privileged mode to run buildx).
+#
+# Pull from the registry (on the deploy host):
+#   docker pull registry.azfirazka.com/cora:develop
+
+steps:
+  # ── Rust checks ──────────────────────────────────────────────────────
+  check:
+    image: rust:1.85-bookworm
+    commands:
+      - cargo check --all-targets --features tree-sitter
+    when:
+      event: [push, pull_request]
+
+  fmt:
+    image: rust:1.85-bookworm
+    commands:
+      - rustup component add rustfmt
+      - cargo fmt --all -- --check
+    when:
+      event: [push, pull_request]
+
+  clippy:
+    image: rust:1.85-bookworm
+    commands:
+      - rustup component add clippy
+      - cargo clippy --all-targets --features tree-sitter -- -D warnings
+    when:
+      event: [push, pull_request]
+
+  test:
+    image: rust:1.85-bookworm
+    commands:
+      - cargo test --features tree-sitter
+    when:
+      event: [push, pull_request]
+
+  # ── Docker build & push to Zot ──────────────────────────────────────
+  docker:
+    image: woodpeckerci/plugin-docker-buildx:5
+    settings:
+      repo: registry.azfirazka.com/cora
+      registry: registry.azfirazka.com
+      username:
+        from_secret: ZOT_USER
+      password:
+        from_secret: ZOT_PASS
+      dockerfile: Dockerfile
+      no_cache: true
+      auto_tag: true
+      auto_tag_suffix: sha-${CI_COMMIT_SHA:0:7}
+      privileged: true
+    when:
+      - branch: develop
+        event: push
+      - event: tag

Dockerfile

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+# Cora Code — Docker image for self-hosted deployment.
+#
+# Multi-stage build:
+#   1. Builder: rust:1.85 (glibc) — compile with tree-sitter + LTO
+#   2. Runtime: debian:bookworm-slim — minimal glibc base, ~15MB final image
+#
+# Usage:
+#   docker build -t cora .
+#   docker run --rm cora --version
+#   docker run --rm -e CORA_API_KEY=sk-xxx -v $(pwd):/workspace cora review --staged
+#   docker run --rm cora mcp serve          # MCP server (stdio)
+
+# ── Builder ────────────────────────────────────────────────────────────
+FROM rust:1.85-bookworm AS builder
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+        pkg-config \
+        libssl-dev \
+        build-essential \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+# Cache dependencies — copy only Cargo files first.
+COPY Cargo.toml Cargo.lock ./
+RUN mkdir -p src && echo "fn main() {}" > src/main.rs
+RUN cargo build --release --features tree-sitter 2>/dev/null || true
+
+# Copy real source and rebuild (cached deps reused).
+COPY src/ src/
+RUN touch src/main.rs && cargo build --release --features tree-sitter
+
+# ── Runtime ─────────────────────────────────────────────────────────────
+FROM debian:bookworm-slim
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+        ca-certificates \
+        libssl3 \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY --from=builder /app/target/release/cora /usr/local/bin/cora
+
+# Create non-root user for running cora.
+RUN groupadd --gid 1000 cora && \
+    useradd --uid 1000 --gid cora --create-home --shell /bin/sh cora
+
+USER cora
+
+# Default workdir for review targets.
+WORKDIR /workspace
+
+ENTRYPOINT ["cora"]

docker-compose.yml

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+# Cora Code — local dev / single-host deploy via Docker Compose.
+#
+# Pulls prebuilt image from the self-hosted Zot registry.
+# For local builds: docker compose up --build
+#
+# Usage:
+#   docker compose pull && docker compose run --rm cora --version
+#   docker compose run --rm -e CORA_API_KEY=sk-xxx cora review --staged
+#   docker compose run --rm cora mcp serve
+#
+# Volumes:
+#   ./data:/data          — persistent storage (cora index DB, config)
+#   .:/workspace          — mount repo for code review (development)
+
+services:
+  cora:
+    image: registry.azfirazka.com/cora:${CORA_TAG:-develop}
+    build:
+      context: .
+      dockerfile: Dockerfile
+    container_name: cora
+    working_dir: /workspace
+    volumes:
+      - ./data:/data
+      - .:/workspace
+    environment:
+      - CORA_HOME=/data
+    # Default: show version (override via docker compose run)
+    command: ["--version"]