Created the managarr-demo repository and created a Dockerfile for CI/CD builds. Added Docker sections to the README as well

Dockerfile

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+FROM clux/muslrust:stable AS builder
+WORKDIR /usr/src
+
+# Download and compile Rust dependencies in an empty project and cache as a separate Docker layer
+RUN USER=root cargo new --bin managarr-temp
+
+WORKDIR /usr/src/managarr-temp
+COPY Cargo.* .
+RUN cargo build --release --target x86_64-unknown-linux-musl
+# remove src from empty project
+RUN rm -r src
+COPY src ./src
+# remove previous deps
+RUN rm ./target/x86_64-unknown-linux-musl/release/deps/managarr*
+
+RUN --mount=type=cache,target=/volume/target \
+    --mount=type=cache,target=/root/.cargo/registry \
+    cargo build --release --target x86_64-unknown-linux-musl --bin managarr
+RUN mv target/x86_64-unknown-linux-musl/release/managarr .
+
+FROM debian:stable-slim
+
+# Copy the compiled binary from the builder container
+COPY --from=builder --chown=nonroot:nonroot /usr/src/managarr-temp/managarr /usr/local/bin
+
+ENTRYPOINT [ "/usr/local/bin/managarr" ]