Install OpenSSL dev packages for alloy build

Dockerfile

@@ -1,5 +1,6 @@
-# Build stage – use a modern Rust version
+# Build stage – install OpenSSL dev libraries for Rust compilation
 FROM rust:1.90-slim-bookworm as builder
+RUN apt-get update && apt-get install -y pkg-config libssl-dev && rm -rf /var/lib/apt/lists/*
 WORKDIR /app
 COPY Cargo.toml Cargo.lock* ./
 COPY src src