Initial commit of Docker project

Dockerfile

@@ -0,0 +1,62 @@
+# ─────────────────────────────────────────────────────────────────────────────
+# Stage 1: Builder
+# Installs ALL dependencies and compiles the React frontend inside Docker.
+# Nothing needs to be installed on the host machine except Docker itself.
+# ─────────────────────────────────────────────────────────────────────────────
+FROM node:20-alpine AS builder
+
+WORKDIR /build
+
+# Install backend deps
+COPY package.json ./
+RUN npm install
+
+# Install frontend deps and build React app
+COPY client/package.json ./client/
+RUN cd client && npm install
+
+COPY client/ ./client/
+RUN cd client && npm run build
+
+# ─────────────────────────────────────────────────────────────────────────────
+# Stage 2: Production image
+# Copies only what's needed to run — no dev tools, no node_modules for client.
+# Final image is lean (~180MB) and ready to run with zero host setup.
+# ─────────────────────────────────────────────────────────────────────────────
+FROM node:20-alpine AS production
+
+# Chromium + deps for Phase 3 Puppeteer PDF generation
+RUN apk add --no-cache \
+    chromium \
+    nss \
+    freetype \
+    harfbuzz \
+    ca-certificates \
+    ttf-freefont
+
+ENV PUPPETEER_SKIP_CHROMIUM_DOWNLOAD=true
+ENV PUPPETEER_EXECUTABLE_PATH=/usr/bin/chromium-browser
+ENV NODE_ENV=production
+ENV PORT=3001
+ENV DB_PATH=/data/cpas.db
+
+WORKDIR /app
+
+# Copy backend deps from builder
+COPY --from=builder /build/node_modules ./node_modules
+COPY --from=builder /build/client/dist  ./client/dist
+
+# Copy backend source
+COPY server.js   ./
+COPY db/         ./db/
+COPY package.json ./
+
+# Ensure data directory exists (will be overridden by volume mount)
+RUN mkdir -p /data
+
+EXPOSE 3001
+
+HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
+    CMD wget -qO- http://localhost:3001/api/health || exit 1
+
+CMD ["node", "server.js"]