ci: add proper cross compiling!

.woodpecker/build-and-publish.yml

@@ -3,6 +3,21 @@ when:
     branch: main
 
 steps:
+  - name: build-x86_64
+    image: rust:bookworm
+    commands:
+      - cargo build --release
+  - name: build-arm64
+    image: rust:bookworm
+    commands:
+      - dpkg --add-architecture arm64
+      - apt-get update -y && apt-get install -y crossbuild-essential-arm64 libssl-dev:arm64
+      - rustup target add aarch64-unknown-linux-gnu
+      - cargo build --target aarch64-unknown-linux-gnu --release
+    environment:
+      CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER: aarch64-linux-gnu-gcc
+      PKG_CONFIG_ALLOW_CROSS: 1
+      PKG_CONFIG_PATH: /usr/aarch64-linux-gnu/lib/pkgconfig
   - name: container-build-and-publish
     image: docker
     commands: