Restructure folders (#411)

basics/docker_sample/Dockerfile

@@ -0,0 +1,24 @@
+FROM rust:1-slim-buster AS base
+
+ENV USER=root
+
+WORKDIR /code
+RUN cargo init
+COPY Cargo.toml /code/Cargo.toml
+RUN cargo fetch
+
+COPY src /code/src
+
+CMD [ "cargo", "test", "--offline" ]
+
+FROM base AS builder
+
+RUN cargo build --release --offline
+
+FROM rust:1-slim-buster
+
+COPY --from=builder /code/target/release/docker_sample /usr/bin/docker_sample
+
+EXPOSE 5000
+
+ENTRYPOINT [ "/usr/bin/docker_sample" ]