docker: cache volumes in build & debian for runtime

Author: ghthor

.dockerignore

@@ -3,3 +3,5 @@ contrib/
 target/
 venv/
 .github/
+Dockerfile
+docker-compose.yml

Dockerfile

@@ -2,15 +2,24 @@ FROM rust:1.81 AS builder
 
 RUN mkdir /build
 WORKDIR /build
-COPY ./ .
 
-RUN cargo build --release --features s3
+COPY --link ./Cargo.toml .
+COPY --link ./build.rs .
+COPY --link ./src ./src
+COPY --link ./tests .
 
-FROM alpine
+RUN --mount=type=cache,target=/usr/local/cargo/registry,id=kdi-cargo-registry \
+    --mount=type=cache,target=/usr/local/cargo/git,id=kdi-cargo-git \
+    --mount=type=cache,target=target,id=kdi-target \
+    cargo build --release --features s3 && cp target/release/kafka-delta-ingest .
 
-RUN apk add -U ca-certificates
+FROM debian:12
+
+RUN apt-get update && apt-get -y install \
+    ca-certificates \
+  && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /build
 
-COPY --from=builder /build/target/release/kafka-delta-ingest ./
+COPY --from=builder /build/kafka-delta-ingest ./
 ENTRYPOINT ["/build/kafka-delta-ingest"]