chore: Simplify Dockerfile to use Bun preview command directly

Dockerfile

@@ -5,19 +5,11 @@ WORKDIR /app
 # Install dependencies into temp directory
 # This will cache them and speed up future builds
 COPY package.json bun.lock ./
-RUN bun install --frozen-lockfile
+RUN bun install
 
 # Copy all project files and build the application
 COPY . .
 ENV NODE_ENV=production
 RUN bun run build
 
-# Stage 2: Serve the application with Nginx
-FROM nginx:alpine
-# Copy the built assets from the builder stage
-COPY --from=builder /app/dist /usr/share/nginx/html
-# Use custom Nginx configuration
-COPY ./nginx.conf /etc/nginx/conf.d/default.conf
-EXPOSE 7860
-CMD ["nginx", "-g", "daemon off;"]
-# docker build -t react-app . && docker run -p 7860:7860 react-app
+CMD ["bun", "run", "preview"]