buildx failed with: ERROR: failed to solve: process "/bin/sh -c rustup target add $(cat /.cargo-platform.txt) && PROTOC=/usr/bin/protoc RUSTFLAGS='-C target-feature=+crt-static' cargo build --release --target $(cat /.cargo-platform.txt) --package anki-sync-server && mkdir -p /output && cp /build/target/$(cat /.cargo-platform.txt)/release/anki-sync-server /output/anki-sync-server" did not complete successfully: exit code: 101