chore: Remove Dockerfile.fixed artifact

backend/Dockerfile.fixed

@@ -1,20 +0,0 @@
-FROM node:20-alpine AS base
-WORKDIR /app
-
-# Install Bun
-RUN npm install -g bun
-
-# Install dependencies
-COPY package.json bun.lockb* ./
-RUN bun install
-
-# Copy source code
-COPY . .
-
-ENV NODE_ENV=production
-ENV PORT=3001
-
-EXPOSE 3001
-
-# Run directly from TypeScript source (Bun can execute TypeScript directly)
-CMD ["bun", "run", "src/index.ts"]