feat: add Dockerfile for multi-stage container build

Dockerfile

@@ -0,0 +1,15 @@
+FROM oven/bun:alpine AS builder
+
+WORKDIR /app
+
+COPY . .
+ENV NODE_ENV=production
+RUN bun install --frozen-lockfile --production
+
+FROM joseluisq/static-web-server:2-alpine AS runner
+
+WORKDIR /public
+
+COPY --from=builder /app/dist .
+
+EXPOSE 80