Better dockerfile

Dockerfile

@@ -1,10 +1,15 @@
-FROM rust:slim-buster
+FROM rust:slim-buster AS builder
 RUN mkdir -p /opt/portnut
 COPY --chown=root --chmod=0755 ./src /opt/portnut/src
 COPY --chown=root --chmod=0755 ./Cargo.toml /opt/portnut/Cargo.toml
 RUN apt update
-RUN apt install libssl-dev openssl pkg-config -y
+#RUN apt install libssl-dev openssl pkg-config -y
 WORKDIR /opt/portnut
 RUN cargo build --release
 RUN cp target/release/portnut /bin/portnut
-CMD ["/bin/portnut"]
+
+FROM debian:stable-slim
+WORKDIR /opt/
+COPY --from=builder /opt/portnut/target/release/portnut .
+ENTRYPOINT ["/opt/portnut"]
+CMD [ "" ]