chore: add Dockerfile and dockerignore for production build

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Dockerfile

@@ -0,0 +1,32 @@
+# Stage 1: Builder
+FROM oven/bun:1.1-alpine AS builder
+
+WORKDIR /usr/src/app
+
+# Install dependencies (including devDependencies for build and lint)
+COPY package.json tsconfig.json biome.json ./
+RUN bun install
+
+# Copy src and test directories
+COPY src ./src
+COPY test ./test
+
+# Run lint and build
+RUN bun run lint
+RUN bun run build
+
+# Stage 2: Runner
+FROM oven/bun:1.1-slim AS runner
+
+WORKDIR /usr/src/app
+
+# Copy built files, schema, and package.json
+COPY --from=builder /usr/src/app/dist/index.js ./dist/index.js
+COPY schema.sql ./
+COPY package.json ./
+
+# Expose port
+EXPOSE 3000
+
+# Start server
+CMD ["bun", "dist/index.js"]