deploy: add Dockerfile + .dockerignore for Coolify

Dockerfile

@@ -0,0 +1,32 @@
+# ---- Build frontend ----
+FROM node:22-slim AS web-build
+WORKDIR /app
+COPY package*.json ./
+RUN npm ci
+COPY . .
+RUN npm run build
+
+# ---- Runtime ----
+FROM node:22-slim
+WORKDIR /app
+ENV NODE_ENV=production
+ENV HOST=0.0.0.0
+ENV PORT=3000
+
+COPY package*.json ./
+RUN npm ci --omit=dev && npm cache clean --force
+
+# Built frontend (vite outputs to dist/)
+COPY --from=web-build /app/dist ./dist
+
+# Server source (tsx runs TS directly in production)
+COPY server ./server
+COPY shared ./shared
+COPY tsconfig.json ./
+
+# Persistent SQLite data
+RUN mkdir -p /app/data
+VOLUME /app/data
+
+EXPOSE 3000
+CMD ["npx", "tsx", "server/index.ts"]