perf: optimize Docker build using pre-built binaries

- Remove Rust compilation from Dockerfile (no builder stage)
- Use pre-built binaries from build-binaries job artifacts
- Download and extract Linux binaries for amd64/arm64
- Reduce Docker build time from 30+ min to ~2-3 min
- Reduce timeout from 30 to 15 minutes

Docker build now simply copies files instead of compiling Rust workspace.

Author: bug-ops

.github/workflows/release.yml

@@ -105,9 +105,23 @@ jobs:
     name: Publish Docker Image
     needs: [build-binaries]
     runs-on: ubuntu-latest
-    timeout-minutes: 30
+    timeout-minutes: 15
     steps:
       - uses: actions/checkout@v6
+      - name: Download Linux binaries
+        uses: actions/download-artifact@v7
+        with:
+          pattern: binary-*-unknown-linux-gnu
+          path: artifacts
+      - name: Extract and prepare binaries
+        run: |
+          mkdir -p binaries
+          tar -xzf artifacts/binary-x86_64-unknown-linux-gnu/zeph-x86_64-unknown-linux-gnu.tar.gz -C binaries
+          mv binaries/zeph binaries/zeph-amd64
+          tar -xzf artifacts/binary-aarch64-unknown-linux-gnu/zeph-aarch64-unknown-linux-gnu.tar.gz -C binaries
+          mv binaries/zeph binaries/zeph-arm64
+          chmod +x binaries/zeph-*
+          ls -lh binaries/
       - uses: docker/setup-qemu-action@v3
       - uses: docker/setup-buildx-action@v3
       - uses: docker/login-action@v3

Dockerfile

@@ -1,26 +1,19 @@
-FROM rust:1.88-slim-bookworm AS builder
-
-WORKDIR /build
-
-COPY Cargo.toml Cargo.lock ./
-COPY src/ src/
-COPY crates/ crates/
-
-RUN cargo build --release && strip target/release/zeph
-
 FROM container-registry.oracle.com/os/oraclelinux:9-slim
 
+ARG TARGETARCH
+
 RUN microdnf install -y shadow-utils ca-certificates && \
     microdnf clean all && \
     useradd --system --no-create-home --shell /sbin/nologin zeph
 
 WORKDIR /app
 
-COPY --from=builder /build/target/release/zeph /app/zeph
+COPY binaries/zeph-${TARGETARCH} /app/zeph
 COPY config/ /app/config/
 COPY skills/ /app/skills/
 
-RUN chown -R zeph:zeph /app
+RUN chown -R zeph:zeph /app && \
+    chmod +x /app/zeph
 
 USER zeph