feat: add support for arm64 (#142)

- set explicit action permissions
- make package owner dynamic so forks can test workflow
- build multi platform images using cross compilation amd64 -> arm64
- add a scope to buildx gha cache

Dockerfile

@@ -1,12 +1,27 @@
 # Build Stage
-FROM rustlang/rust:nightly-slim AS builder
+FROM --platform="${BUILDPLATFORM}" rustlang/rust:nightly-slim
 USER 0:0
 WORKDIR /home/rust/src
 
-# Install build requirements
-RUN apt-get update && apt-get install -y libssl-dev pkg-config
+ARG TARGETARCH
 
-# Build all crates
+# Install build requirements
+RUN dpkg --add-architecture "${TARGETARCH}"
+RUN apt-get update && \
+    apt-get install -y \
+    make \
+    pkg-config \
+    libssl-dev:"${TARGETARCH}"
+COPY scripts/build-image-layer.sh /tmp/
+RUN sh /tmp/build-image-layer.sh tools
+
+# Build all dependencies
 COPY Cargo.toml Cargo.lock ./
+COPY crates/bonfire/Cargo.toml ./crates/bonfire/
+COPY crates/delta/Cargo.toml ./crates/delta/
+COPY crates/quark/Cargo.toml ./crates/quark/
+RUN sh /tmp/build-image-layer.sh deps
+
+# Build all apps
 COPY crates ./crates
-RUN cargo build --locked --release
+RUN sh /tmp/build-image-layer.sh apps