fix: experiment with filter-syscalls = false

- arm64 build fails with docker/build-push-action@v4
- NixOS/nix#5258
- LnL7/nix-docker#41

testing/Dockerfile

@@ -8,7 +8,7 @@ ENV USER=${USER}
 ENV HOME=/home/${USER}
 ENV PATH="${HOME}/.nix-profile/bin:${PATH}"
 ENV NIX_INSTALL_URL="https://install.determinate.systems/nix"
-ENV NIX_INSTALL_ARGS="install linux --extra-conf 'sandbox = false' --init none --no-confirm"
+ENV NIX_INSTALL_ARGS="install linux --extra-conf 'sandbox = false' --extra-conf 'filter-syscalls = false' --init none --no-confirm"
 
 # install primary Debian packages
 RUN apt update -y && \