Dockerfile: decrease image size

Dockerfile

 # SPDX-FileCopyrightText: 2023 Laurent Modolo <laurent.modolo@ens-lyon.fr>
 #
 # SPDX-License-Identifier: AGPL-3.0-or-later
-FROM rust:1.66.1
+FROM rust:1.67-alpine3.17 AS build
 
-RUN cargo install --git http://gitbio.ens-lyon.fr/LBMC/Bernard/bamcalib.git
+RUN apk add --no-cache musl-dev pkgconfig openssl-dev && cargo install --git http://gitbio.ens-lyon.fr/LBMC/Bernard/bamcalib.git
+
+FROM alpine:3.17
+
+COPY --from=build /usr/local/cargo/bin/bamcalib /usr/bin/