initial commit

backend/Dockerfile

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+FROM node:20-alpine
+
+WORKDIR /app
+
+# Install dependencies first (layer cache)
+COPY package.json package-lock.json* ./
+RUN npm ci --omit=dev
+
+# Copy source
+COPY src/ ./src/
+
+# Data directory for persistent files (mounted as a volume)
+RUN mkdir -p /data
+
+EXPOSE 3001
+
+ENV NODE_ENV=production \
+    PORT=3001 \
+    DB_PATH=/data/dns-cache.json \
+    SETTINGS_PATH=/data/settings.json \
+    USERS_PATH=/data/users.json \
+    AUDIT_PATH=/data/audit-log.json \
+    SECRETS_PATH=/data/secrets.json \
+    IPAM_PATH=/data/ipam.json
+
+CMD ["node", "src/index.js"]