ci: try using cross for cross compile

.woodpecker/build-and-publish.yml

@@ -9,12 +9,13 @@ steps:
       - cargo build --release
       - cp target/release/backend target/backend-amd64
   - name: build-arm64
-    image: rust:alpine
+    image: rust:bookworm
     commands:
-      - apk add musl-dev
-      - rustup target add aarch64-unknown-linux-musl
-      - cargo build --target=aarch64-unknown-linux-musl --release
-      - cp target/aarch64-unknown-linux-musl/release/backend target/backend-arm64
+      - CROSS_CONTAINER_IN_CONTAINER=true cargo install -f cross
+      - CROSS_CONTAINER_IN_CONTAINER=true cross build --target=aarch64-unknown-linux-gnu --release
+      - cp target/aarch64-unknown-linux/release/backend target/backend-arm64
+    volumes:
+      - /var/run/podman/podman.sock:/var/run/docker.sock
   - name: container-build-and-publish
     image: docker
     commands:

Cross.toml

@@ -0,0 +1,5 @@
+[build]
+pre-build = [
+    "dpkg --add-architecture $CROSS_DEB_ARCH", 
+    "apt-get update && apt-get --assume-yes install libssl-dev:$CROSS_DEB_ARCH"
+]