try this

Author: r-near

eth2near/Dockerfile

@@ -1,7 +1,9 @@
 # syntax=docker/dockerfile:1
-FROM rust:1.84.0-bookworm AS chef
-# Install cargo-chef for dependency caching
-RUN cargo install cargo-chef
+FROM lukemathwalker/cargo-chef:latest-rust-1.84-slim-bookworm AS chef
+RUN cargo install --locked sccache
+ENV RUSTC_WRAPPER=sccache
+ENV SCCACHE_CACHE_SIZE=2G
+ENV SCCACHE_DIR=/sccache
 WORKDIR /app
 
 FROM chef AS planner
@@ -25,19 +27,24 @@ WORKDIR /app/eth2near
 RUN --mount=type=cache,target=/app/eth2near/target \
     --mount=type=cache,target=/usr/local/cargo/registry \
     --mount=type=cache,target=/usr/local/cargo/git \
+    --mount=type=cache,target=/sccache,sharing=locked \
     cargo chef cook --release --recipe-path recipe.json
 
 # Copy source code and build the actual project
 COPY eth2near/ ./
 
-# Build the final binaries - only rebuilds when source changes
+# Build with sccache - only rebuilds when source changes
 RUN --mount=type=cache,target=/app/eth2near/target \
     --mount=type=cache,target=/usr/local/cargo/registry \
     --mount=type=cache,target=/usr/local/cargo/git \
+    --mount=type=cache,target=/sccache,sharing=locked \
     cargo build --release && \
     cp target/release/eth2-contract-init /tmp/ && \
     cp target/release/eth2_to_near_relay /tmp/
 
+# Show sccache stats (optional, for debugging)
+RUN sccache --show-stats
+
 # === RUNTIME STAGE ===
 FROM debian:bookworm-slim AS runtime