switch to bun alpine image in dockerfile

Dockerfile

@@ -1,11 +1,7 @@
-# ---------- Build-Stage ----------
-FROM node:22-alpine AS builder
+# ---------- Build-Stage mit Bun ----------
+FROM oven/bun:alpine AS builder
 WORKDIR /app
 
-RUN apk add --no-cache curl \
-    && curl -fsSL https://bun.sh/install | bash \
-    && ln -s /root/.bun/bin/bun /usr/local/bin/bun
-
 COPY package*.json ./
 RUN bun install
 
@@ -18,7 +14,6 @@ FROM node:22-alpine
 WORKDIR /app
 
 RUN npm install -g serve@14
-
 COPY --from=builder /app/dist/tools-website ./dist/tools-website
 
 EXPOSE 3000