Simplify Bun installation using npm

Dockerfile

@@ -28,19 +28,7 @@ RUN apt-get update \
         libssl-dev \
     && rm -rf /var/lib/apt/lists/*
 
-RUN set -euxo pipefail; \
-    arch=$(uname -m); \
-    target=linux-x64; \
-    if [ "$arch" = "aarch64" ] || [ "$arch" = "arm64" ]; then target=linux-aarch64; fi; \
-    echo "Installing Bun ${BUN_VERSION} for ${target}..." && \
-    curl -fsSL --retry 3 --retry-delay 2 -o /tmp/bun-${target}.zip "https://github.com/oven-sh/bun/releases/download/bun-v${BUN_VERSION}/bun-${target}.zip" && \
-    mkdir -p /opt/bun/bin && \
-    unzip -o /tmp/bun-${target}.zip -d /tmp/bun-extract && \
-    mv /tmp/bun-extract/bun-${target}/bun /opt/bun/bin/bun && \
-    chmod +x /opt/bun/bin/bun && \
-    ln -sf /opt/bun/bin/bun /usr/local/bin/bun && \
-    rm -rf /tmp/bun-${target}.zip /tmp/bun-extract && \
-    bun --version
+RUN npm install -g bun@${BUN_VERSION} && bun --version
 
 RUN curl -fsSL -o /tmp/powershell.tar.gz \
     "https://github.com/PowerShell/PowerShell/releases/download/v${PWSH_VERSION}/powershell-${PWSH_VERSION}-linux-x64.tar.gz" \