fix: add go download fallback for production bootstrap

tools/deploy/production-bootstrap.sh

@@ -80,7 +80,20 @@ install_go() {
     return
   fi
   log "Installing Go ${version} for linux-${arch}"
-  curl -fL "https://go.dev/dl/go${version}.linux-${arch}.tar.gz" -o /tmp/go.tar.gz
+  local downloaded=""
+  for url in \
+    "https://dl.google.com/go/go${version}.linux-${arch}.tar.gz" \
+    "https://golang.google.cn/dl/go${version}.linux-${arch}.tar.gz" \
+    "https://go.dev/dl/go${version}.linux-${arch}.tar.gz"; do
+    if curl -fL --connect-timeout 20 --max-time 300 "$url" -o /tmp/go.tar.gz; then
+      downloaded="yes"
+      break
+    fi
+  done
+  if [[ "$downloaded" != "yes" ]]; then
+    echo "Failed to download Go ${version} for linux-${arch}." >&2
+    exit 1
+  fi
   rm -rf /usr/local/go
   tar -C /usr/local -xzf /tmp/go.tar.gz
   ln -sf /usr/local/go/bin/go /usr/local/bin/go