Dockerfile: use rust as base image

Dockerfile

@@ -4,7 +4,6 @@ COPY Cargo.toml /app
 WORKDIR /app
 RUN cargo build --release
 
-FROM debian:bookworm-slim
-RUN apt-get update && apt install -y openssl
+FROM rust:latest
 COPY --from=build-env /app/target/release/cyberpunk_display /
 ENTRYPOINT ["./cyberpunk_display"]