chore(docker): optimize dockerfile

Dockerfile

@@ -1,8 +1,24 @@
-FROM rust:1.77.0
+FROM rust:1.77.0 AS builder
+
 WORKDIR /app
 RUN apt-get update && apt-get install lld clang -y
 COPY . .
 ENV SQLX_OFFLINE true
 RUN cargo build --release
+
+
+FROM debian:bookworm-slim AS runtime
+WORKDIR /app
+# Install OpenSSL - it is dynamically linked by some of our dependencies
+# Install ca-certificates - it is needed to verify TLS certificates when establishing HTTPS connections
+RUN apt-get update -y \
+        && apt-get install -y --no-install-recommends openssl ca-certificates \
+        # Clean up
+        && apt-get autoremove -y \
+        && apt-get clean -y \
+        && rm -rf /var/lib/apt/lists/*
+
+COPY --from=builder /app/target/release/zero2prod zero2prod
+COPY config config
 ENV APP_ENVIRONMENT production
-ENTRYPOINT ["./target/release/zero2prod"]
+ENTRYPOINT ["./zero2prod"]