Remove cargo chef from Dockerfile

[manuelmauro]

Use something like this:

# Use the official Rust image as the base image
FROM rust:latest as builder

# Create a new empty shell project
RUN USER=root cargo new --bin app
WORKDIR /app

# Copy our manifests
COPY ./Cargo.lock ./Cargo.lock
COPY ./Cargo.toml ./Cargo.toml

# This build step will cache your dependencies
RUN cargo build --release
RUN rm src/*.rs

# Now that the dependencies are built, copy your source code
COPY ./src ./src

# Build for release.
# Touch the main file to force recompilation of the source code (in case it was changed)
RUN touch src/main.rs && cargo build --release

# The final stage, which copies the binary from the "builder" stage and reduces the final image size
FROM debian:buster-slim
COPY --from=builder /app/target/release/your-app-name .

# Set the command to run your binary
CMD ["./your-app-name"]