add libssl-dev as dependency

Dockerfile

@@ -3,13 +3,17 @@ FROM docker.io/rust:1.78.0-slim-bookworm
 # nodejs - runtime used by forgejo/github actions
 # curl - to download cargo-binstall
 # clang-16 & mold - faster linkers for rust
-RUN apt-get update && \
+# libssl-dev - build dependency for git-next
+RUN apt-get update \
+  && \
   apt-get install -y \
   --no-install-recommends \
   nodejs=18.19.0+dfsg-6~deb12u1 \
   curl=7.88.1-10+deb12u5 \
   clang-16=1:16.0.6-15~deb12u1 \
-  mold=1.10.1+dfsg-1 && \
+  mold=1.10.1+dfsg-1 \
+  libssl-dev=3.0.11-1~deb12u2 \
+  && \
   rm -r /var/lib/apt/lists/*
 
 RUN curl -L https://github.com/cargo-bins/cargo-binstall/releases/latest/download/cargo-binstall-x86_64-unknown-linux-musl.tgz -o cargo-binstall.tgz && \