install docker for reproduceable builds

Author: MarcosNicolau

docker/proof-aggregator.Dockerfile

@@ -14,7 +14,28 @@ COPY crates /aligned_layer/crates/
 COPY aggregation_mode /aligned_layer/aggregation_mode/
 WORKDIR /aligned_layer
 
-RUN IN_DOCKER=true cargo build --manifest-path ./aggregation_mode/Cargo.toml --features prove --release --bin proof_aggregator_cpu
+RUN apt update -y && apt install -y libssl-dev ca-certificates
+
+# Install required tools and set up Docker repository
+# Installing docker is necessary for SP1 and Risc0 wrapping to snark
+RUN apt-get update && apt-get install -y \
+    ca-certificates \
+    curl \
+    gnupg \
+    lsb-release && \
+    install -m 0755 -d /etc/apt/keyrings && \
+    curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc && \
+    chmod a+r /etc/apt/keyrings/docker.asc && \
+    echo \
+    "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian \
+    $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
+    tee /etc/apt/sources.list.d/docker.list > /dev/null && \
+    apt-get update
+
+# Note, we don't need to install docker-ce and containerd.io as we pass the docker engine socket via docker volume
+RUN apt-get install docker-ce-cli docker-buildx-plugin docker-compose-plugin -y
+
+RUN cargo build --manifest-path ./aggregation_mode/Cargo.toml --features prove --release --bin proof_aggregator_cpu
 
 FROM debian:bookworm-slim AS final