Add servatrice debian 12

.ci/Servatrice_Debian12/Dockerfile

@@ -0,0 +1,21 @@
+FROM debian:12
+
+RUN apt-get update && \
+    DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+        build-essential \
+        ccache \
+        clang-format \
+        cmake \
+        file \
+        g++ \
+        git \
+        libmariadb-dev-compat \
+        libprotobuf-dev \
+        libqt6sql6-mysql \
+        ninja-build \
+        protobuf-compiler \
+        qt6-tools-dev \
+        qt6-tools-dev-tools \
+        qt6-websockets-dev \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*