include lsb_release in Docker image (#240)

Author: wojcik91

Dockerfile

@@ -40,7 +40,7 @@ RUN cargo install --locked --path . --root /build
 # run
 FROM debian:13-slim AS runtime
 RUN apt-get update -y && apt upgrade -y && \
-    apt-get install --no-install-recommends -y ca-certificates libssl-dev && \
+    apt-get install --no-install-recommends -y ca-certificates libssl-dev lsb-release && \
     rm -rf /var/lib/apt/lists/*
 WORKDIR /app
 COPY --from=builder /build/bin/defguard-proxy .