ci: Add slim Dockerfile.ci files for faster CI builds

- Add Dockerfile.ci for backend, cannaiq, findadispo, findagram
- Frontend Dockerfiles just copy pre-built assets to nginx
- Backend Dockerfile copies pre-built dist/node_modules
- Reduces Docker build time by doing npm ci/build in CI step

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/Dockerfile.ci

@@ -0,0 +1,43 @@
+# CI Dockerfile - assets pre-built in CI step
+# No npm install or build - just copy and run
+FROM node:22-slim
+
+# Build arguments for version info
+ARG APP_BUILD_VERSION=dev
+ARG APP_GIT_SHA=unknown
+ARG APP_BUILD_TIME=unknown
+
+ENV APP_BUILD_VERSION=${APP_BUILD_VERSION}
+ENV APP_GIT_SHA=${APP_GIT_SHA}
+ENV APP_BUILD_TIME=${APP_BUILD_TIME}
+
+# Install runtime dependencies only (Chromium for Puppeteer)
+RUN apt-get update && apt-get install -y \
+    curl \
+    chromium \
+    fonts-liberation \
+    libnss3 \
+    libxss1 \
+    libasound2 \
+    libatk-bridge2.0-0 \
+    libgtk-3-0 \
+    --no-install-recommends \
+    && rm -rf /var/lib/apt/lists/*
+
+ENV PUPPETEER_SKIP_CHROMIUM_DOWNLOAD=true
+ENV PUPPETEER_EXECUTABLE_PATH=/usr/bin/chromium
+
+WORKDIR /app
+
+# Copy pre-built assets from CI
+COPY backend/package*.json ./
+COPY backend/node_modules ./node_modules
+COPY backend/dist ./dist
+COPY backend/migrations ./migrations
+COPY backend/public/downloads ./public/downloads
+
+RUN mkdir -p /app/public/images/products
+
+EXPOSE 3010
+
+CMD ["node", "dist/index.js"]