Fixes https://github.com/oven-sh/bun/issues/9807 (#9875)

Co-authored-by: Jarred Sumner <709451+Jarred-Sumner@users.noreply.github.com>

dockerhub/debian-slim/Dockerfile

@@ -3,6 +3,7 @@ FROM debian:bullseye-slim AS build
 # https://github.com/oven-sh/bun/releases
 ARG BUN_VERSION=latest
 
+# We add python3 for node-gyp, see https://github.com/oven-sh/bun/issues/9807
 RUN apt-get update -qq \
     && apt-get install -qq --no-install-recommends \
       ca-certificates \
@@ -11,6 +12,7 @@ RUN apt-get update -qq \
       gpg \
       gpg-agent \
       unzip \
+      python3 \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/* \
     && arch="$(dpkg --print-architecture)" \