use debian instead of gcc for runtime

comment and organize it a bit
drop gcc to 12 since we are using debian 12 as well

Dockerfile

@@ -1,4 +1,4 @@
-FROM gcc:13 as build
+FROM gcc:12 as build
 
 WORKDIR /app
 
@@ -7,30 +7,38 @@ RUN set -ex; \
     apt-get install -y cmake
 
 COPY . /app/
+COPY --chmod=0500 ./build.sh /app/
 
 RUN sed -i 's/MARIADB_CONNECTOR_COMPILE_JOBS__=.*/MARIADB_CONNECTOR_COMPILE_JOBS__=2/' /app/CMakeVariables.txt 
 
-RUN chmod +x build.sh
 RUN ./build.sh
 
-FROM gcc:13 as runtime
+FROM debian:12 as runtime
 
 WORKDIR /app
 
+RUN --mount=type=cache,id=build-apt-cache,target=/var/cache/apt \
+    apt update && \
+    apt install -y libssl3 libcurl4 && \
+    rm -rf /var/lib/apt/lists/*
+
+# Grab libraries and load them
+COPY --from=build /app/build/mariadbcpp/src/mariadb_connector_cpp-build/libmariadb/libmariadb/libmariadb.so.3 /usr/local/lib
+RUN ldconfig
+
+# Server bins
 COPY --from=build /app/build/*Server /app/
+
+# Necessary suplimentary files
 COPY --from=build /app/build/*.ini /app/default-configs/
-COPY --from=build /app/build/*.so /usr/lib/
-COPY --from=build /app/build/mariadbcpp/src/mariadb_connector_cpp-build/*.so /usr/lib/
-COPY --from=build /app/build/mariadbcpp/src/mariadb_connector_cpp-build/mariadbcpp/plugin/*.so /usr/lib/
 COPY --from=build /app/build/vanity /app/default-vanity
 COPY --from=build /app/build/navmeshes /app/navmeshes
 COPY --from=build /app/build/migrations /app/migrations
 COPY --from=build /app/build/*.dcf /app/
-COPY --chmod=0500 ./entrypoint.sh /app/
-RUN ldconfig
 
 # needed as the container runs with the root user
 # and therefore sudo doesn't exist
 ENV USE_SUDO_AUTH=0
 
+COPY --chmod=0500 ./entrypoint.sh /app/
 ENTRYPOINT [ "/app/entrypoint.sh" ]