[grade=pending] QA sprint: commit 103 at-risk files from multi-agent sprint work

Committed by Hermes autonomous QA sprint 2026-08-13.
These files were modified during the Aug 12 sprint but never committed.

dashcaddy-api/Dockerfile

@@ -1,21 +1,29 @@
-FROM node:20-alpine
+# ── Build stage: install all deps (including devDeps for build tooling) ──────
+FROM node:20.11.1-alpine3.19 AS builder
+
+WORKDIR /app
+
+COPY package*.json ./
+RUN npm install
+
+# ── Production stage: only production deps + source ──────────────────────────
+FROM node:20.11.1-alpine3.19
 
 WORKDIR /app
 
 # Install OpenSSL for certificate generation
 RUN apk add --no-cache openssl
 
-COPY package*.json ./
-RUN npm install --production
+# Copy production dependencies from builder
+COPY --from=builder /app/node_modules ./node_modules
 
+# Copy application source
 COPY *.js ./
 COPY src/ ./src/
 COPY routes/ ./routes/
 COPY openapi.yaml ./
 
-# VERSION file holds the short git SHA the image was built from. Committed as
-# 'dev' for source builds; the release script (scripts/release.sh) overwrites it
-# with the actual commit hash before tarballing each release.
+# VERSION file holds the short git SHA the image was built from.
 COPY VERSION ./
 
 # Note: Running as root because container needs Docker socket access