CI: add pre-baked ci-base image (producer) [Phase 1a]

Producer half of the Woodpecker CI cache work (#634). Adds Dockerfile.ci
and .woodpecker/ci-image.yml only — nothing in this PR references the
ci-base image yet, so its own CI runs on the existing node:22-alpine and
stays green.

Review fixes applied:
- N2: bake `bash` into the apk toolchain (ci.yml's sanitization step
  otherwise does a per-run `apk add bash`).
- N1: correct the Dockerfile comments — `pnpm fetch` only populates the
  tarball store; native node-gyp modules still compile at `pnpm install`,
  which is why the musl toolchain stays baked.

After merge, ci-base:latest is primed via a manual `ci-image` pipeline
trigger on main; the consumer PR (#635) then switches ci.yml/publish.yml
to pull it.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.woodpecker/ci.yml

@@ -1,9 +1,5 @@
-# &node_image is the pre-baked CI base built by .woodpecker/ci-image.yml:
-# node:22-alpine + python3/make/g++/postgresql-client + pnpm + a warm pnpm
-# store. The install step resolves from the baked store (--prefer-offline)
-# instead of paying a ~731s cold fetch + native compile every run.
 variables:
-  - &node_image 'git.mosaicstack.dev/mosaicstack/stack/ci-base:latest'
+  - &node_image 'node:22-alpine'
   - &enable_pnpm 'corepack enable'
 
 when:
@@ -19,9 +15,8 @@ steps:
     image: *node_image
     commands:
       - corepack enable
-      # python3/make/g++ are baked into ci-base; --prefer-offline resolves from
-      # the baked pnpm store.
-      - pnpm install --frozen-lockfile --prefer-offline
+      - apk add --no-cache python3 make g++
+      - pnpm install --frozen-lockfile
 
   # Blocking gate: public framework package must contain no operator-specific
   # personal data or private $HOME defaults. Runs early (no node_modules needed).
@@ -69,7 +64,8 @@ steps:
       DATABASE_URL: postgresql://mosaic:mosaic@ci-postgres:5432/mosaic
     commands:
       - *enable_pnpm
-      # postgresql-client (pg_isready) is baked into ci-base.
+      # Install postgresql-client for pg_isready
+      - apk add --no-cache postgresql-client
       # Wait up to 60s for CI postgres to be ready; fail fast if it never comes up.
       - |
         ready=0

.woodpecker/publish.yml

@@ -2,9 +2,7 @@
 # Runs only on main branch push/tag
 
 variables:
-  # Pre-baked CI base (see .woodpecker/ci-image.yml): node:22-alpine +
-  # toolchain + warm pnpm store. Kills the second cold install publish pays.
-  - &node_image 'git.mosaicstack.dev/mosaicstack/stack/ci-base:latest'
+  - &node_image 'node:22-alpine'
   - &enable_pnpm 'corepack enable'
   # Heavy kaniko image builds (~25 min) — gate them so a merge that only touches
   # the npm-only CLI (@mosaicstack/mosaic) or docs does NOT rebuild the platform
@@ -33,8 +31,7 @@ steps:
     image: *node_image
     commands:
       - corepack enable
-      # Resolve from the baked pnpm store instead of a cold network fetch.
-      - pnpm install --frozen-lockfile --prefer-offline
+      - pnpm install --frozen-lockfile
 
   build:
     image: *node_image

Dockerfile.ci

@@ -2,11 +2,14 @@
 #
 # Purpose: eliminate the cold `pnpm install` that dominates every pipeline
 # (~731s median). This image ships the native toolchain (no per-run `apk add`)
-# AND a warm, content-addressable pnpm store with the dependency tree already
-# fetched and its musl native modules (better-sqlite3, node-pty, sqlite3,
-# canvas, sharp) compiled ONCE at build time. A pipeline `pnpm install
-# --frozen-lockfile --prefer-offline` then resolves from local hard-links in
-# tens of seconds.
+# AND a warm, content-addressable pnpm store with the dependency-tree tarballs
+# already fetched at build time. `pnpm fetch` only populates the store from the
+# lockfile — it does NOT run the native node-gyp builds (better-sqlite3,
+# node-pty, sqlite3, canvas, sharp); those still compile at `pnpm install`,
+# which is exactly why the musl toolchain stays baked into this image. A
+# pipeline `pnpm install --frozen-lockfile --prefer-offline` then resolves
+# tarballs from local hard-links (no network) and compiles natives against the
+# already-present toolchain, in tens of seconds instead of ~731s.
 #
 # Rebuilt only when `pnpm-lock.yaml` or this Dockerfile change
 # (see .woodpecker/ci-image.yml).
@@ -17,8 +20,10 @@
 FROM node:22-alpine
 
 # Native toolchain required to compile node-gyp deps on musl, plus the
-# postgresql-client used by the test step's pg_isready readiness probe.
-RUN apk add --no-cache python3 make g++ postgresql-client
+# postgresql-client used by the test step's pg_isready readiness probe. `bash`
+# is baked here too — the sanitization step in ci.yml otherwise does a per-run
+# `apk add bash`.
+RUN apk add --no-cache python3 make g++ postgresql-client bash
 
 # Pin pnpm to the repo's packageManager version via corepack.
 RUN corepack enable && corepack prepare pnpm@10.6.2 --activate
@@ -29,8 +34,10 @@ WORKDIR /app
 ENV PNPM_HOME=/root/.local/share/pnpm
 RUN pnpm config set store-dir /root/.local/share/pnpm/store
 
-# Warm the store + compile native modules once. `pnpm fetch` populates the
-# content-addressable store directly from the lockfile (no package.json /
-# workspace needed), so a baked store stays valid until the lockfile changes.
+# Warm the store. `pnpm fetch` populates the content-addressable store with the
+# dependency tarballs directly from the lockfile (no package.json / workspace
+# needed), so a baked store stays valid until the lockfile changes. Note:
+# `fetch` does NOT compile native modules — that happens later at `pnpm install`
+# in the pipeline, against the toolchain baked above.
 COPY pnpm-lock.yaml ./
 RUN pnpm fetch --frozen-lockfile

packages/mosaic/framework/tools/quality/templates/monorepo/.woodpecker.yml

@@ -2,20 +2,12 @@
 when:
   - event: [push, pull_request, manual]
 
-# Dependencies are installed ONCE in the `install` step and every downstream
-# step depends on it, reusing the populated node_modules from the shared
-# workspace volume. Do NOT re-run `npm ci` per step — that pays the full cold
-# install (network fetch + native rebuilds) N times and is the dominant cost
-# in a pipeline.
-#
-# For best results, replace `&node_image` with a pre-baked CI base image that
-# ships your toolchain (python3/make/g++ for native modules) and a warm npm
-# cache, then keep `--prefer-offline` so installs resolve from the cache. See
-# the Mosaic Stack repo's Dockerfile.ci + .woodpecker/ci-image.yml for the
-# baked-image pattern.
 variables:
   - &node_image 'node:20-alpine'
   - &gitleaks_image 'ghcr.io/gitleaks/gitleaks:v8.24.0'
+  - &install_deps |
+    corepack enable
+    npm ci --ignore-scripts
 
 steps:
   # Secret scanning (runs in parallel with install, no deps)
@@ -25,18 +17,15 @@ steps:
       - gitleaks git --redact --verbose --log-opts="HEAD~1..HEAD"
     depends_on: []
 
-  # Single cached install. Every other step depends on this and reuses the
-  # node_modules it produces in the shared workspace.
   install:
     image: *node_image
     commands:
-      - corepack enable
-      - npm ci --ignore-scripts --prefer-offline
-    depends_on: []
+      - *install_deps
 
   security-audit:
     image: *node_image
     commands:
+      - *install_deps
       - npm audit --audit-level=high
     depends_on:
       - install
@@ -46,6 +35,7 @@ steps:
     environment:
       SKIP_ENV_VALIDATION: 'true'
     commands:
+      - *install_deps
       - npm run lint
     depends_on:
       - install
@@ -55,6 +45,7 @@ steps:
     environment:
       SKIP_ENV_VALIDATION: 'true'
     commands:
+      - *install_deps
       - npm run type-check
     depends_on:
       - install
@@ -64,6 +55,7 @@ steps:
     environment:
       SKIP_ENV_VALIDATION: 'true'
     commands:
+      - *install_deps
       - npm run test -- --coverage --coverageThreshold='{"global":{"branches":80,"functions":80,"lines":80,"statements":80}}'
     depends_on:
       - install
@@ -74,6 +66,7 @@ steps:
       SKIP_ENV_VALIDATION: 'true'
       NODE_ENV: 'production'
     commands:
+      - *install_deps
       - npm run build
     depends_on:
       - lint