add docker files

Dockerfile

@@ -0,0 +1,33 @@
+FROM oven/bun AS base
+WORKDIR /app
+
+# Install dependencies
+FROM base AS install
+RUN mkdir -p /temp/dev
+COPY package.json bun.lock /temp/dev/
+RUN cd /temp/dev && bun install --frozen-lockfile
+
+RUN mkdir -p /temp/prod
+COPY package.json bun.lock /temp/prod/
+RUN cd /temp/prod && bun install --frozen-lockfile --production
+
+# Build
+FROM base AS build
+COPY --from=install /temp/dev/node_modules node_modules
+COPY . .
+ENV NODE_ENV=production
+RUN bun run build
+
+# Runtime
+FROM base AS runtime
+COPY --from=install /temp/prod/node_modules node_modules
+COPY --from=build /app/build build
+COPY --from=build /app/package.json .
+
+USER bun
+ENV NODE_ENV=production
+ENV PORT=3000
+ENV HOST=0.0.0.0
+EXPOSE 3000
+
+CMD ["bun", "build/index.js"]