build: Optimize Dockerfile by adding cache mounts for improved build …

…performance

Also copy only the directories that are needed.

Signed-off-by: Eden Reich <[email protected]>

Dockerfile

@@ -19,7 +19,8 @@ RUN cargo install cargo-chef --locked && \
 WORKDIR /app
 
 FROM chef AS planner
-COPY . .
+COPY Cargo.* ./
+COPY src ./src
 RUN cargo chef prepare --recipe-path recipe.json
 
 FROM chef AS cacher
@@ -31,13 +32,19 @@ ENV CC=clang \
     PATH="/root/.cargo/bin:${PATH}"
 
 COPY --from=planner /app/recipe.json recipe.json
-RUN cargo chef cook --release --target ${TARGET_ARCH} --recipe-path recipe.json
+RUN --mount=type=cache,target=/root/.cargo/registry \
+    --mount=type=cache,target=/root/.cargo/git \
+    --mount=type=cache,target=/app/target \
+    cargo chef cook --release --target ${TARGET_ARCH} --recipe-path recipe.json
 
 FROM cacher AS builder
 ARG TARGET_ARCH
-COPY . .
+COPY src ./src
 COPY --from=cacher /app/target /app/target
-RUN cargo build -vv --release --jobs $(nproc) --target ${TARGET_ARCH}
+RUN --mount=type=cache,target=/root/.cargo/registry \
+    --mount=type=cache,target=/root/.cargo/git \
+    --mount=type=cache,target=/app/target \
+    cargo build --release --jobs $(nproc) --target ${TARGET_ARCH}
 
 FROM gcr.io/distroless/static:nonroot AS minimal
 ARG TARGET_ARCH