Fix Bun installation failure in Docker build for Portainer

Dockerfile

@@ -23,12 +23,21 @@ RUN apt-get update \
         tar \
         xz-utils \
         gzip \
+        unzip \
         libicu-dev \
         libssl-dev \
     && rm -rf /var/lib/apt/lists/*
 
-RUN curl -fsSL https://bun.sh/install | bash -s -- "bun-v${BUN_VERSION}" \
+RUN set -euo pipefail; \
+    arch=$(uname -m); \
+    bun_arch=x64; \
+    if [ "$arch" = "aarch64" ]; then bun_arch=arm64; fi; \
+    curl -fsSL -o /tmp/bun-linux-$bun_arch.zip "https://github.com/oven-sh/bun/releases/download/bun-v${BUN_VERSION}/bun-linux-$bun_arch.zip" \
+    && mkdir -p /opt/bun \
+    && unzip -q /tmp/bun-linux-$bun_arch.zip -d /opt/bun \
+    && ln -sf /opt/bun/bun-linux-$bun_arch/bun /opt/bun/bin/bun \
     && ln -sf /opt/bun/bin/bun /usr/local/bin/bun \
+    && rm -f /tmp/bun-linux-$bun_arch.zip \
     && bun --version
 
 RUN curl -fsSL -o /tmp/powershell.tar.gz \