Add Cross-related metadata to Cargo.toml to fix cross build on Linux

Cargo.toml

@@ -31,3 +31,14 @@ num_cpus = "1.16.0"
 oci-spec = "0.7.0"
 tempdir = "0.3.7"
 thiserror = "1"
+
+# Cross starting from v2 doesn't have OpenSSL
+# See: https://github.com/cross-rs/cross/issues/229
+# To avoid errors like 'The system library `openssl` required by crate `openssl-sys` was not found.',
+# we add this here.
+# See https://github.com/cross-rs/cross/blob/main/docs/config_file.md#build.
+[package.metadata.cross.build]
+pre-build = [
+    "dpkg --add-architecture $CROSS_DEB_ARCH",
+    "apt-get update && apt-get -y install libssl-dev:$CROSS_DEB_ARCH"
+]