Docker image: uses distroless base

Allows to reduce the image size from 102MB to 42MB

server/Dockerfile

@@ -1,20 +1,11 @@
 FROM rust:1-bullseye as builder
-
 RUN apt-get update && \
     apt-get install -y libclang-dev clang
-
 COPY . /oxigraph
 WORKDIR /oxigraph/server 
 RUN cargo build --release
 
-
+FROM gcr.io/distroless/cc-debian11
-FROM debian:bullseye-slim
-
-RUN apt-get update && \
-    apt-get install -y ca-certificates && \
-    rm -rf /var/lib/apt/lists/*
-
 COPY --from=builder /oxigraph/target/release/oxigraph_server /usr/local/bin/oxigraph_server
-
 ENTRYPOINT [ "/usr/local/bin/oxigraph_server" ]
-CMD [ "--location", "/data", "serve", "--bind", "0.0.0.0:7878" ]
+CMD [ "serve", "--location", "/data", "--bind", "0.0.0.0:7878" ]