add Dockerfile and docker-compose for backend and database services

Dockerfile

@@ -0,0 +1,39 @@
+# --- Builder Stage ---
+FROM ubuntu:22.04 AS builder
+ENV DEBIAN_FRONTEND=noninteractive
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential cmake ninja-build git pkg-config \
+    libssl-dev zlib1g-dev \
+    libmariadb-dev libmariadb-dev-compat \
+    libsqlite3-dev python3 libjsoncpp-dev uuid-dev ca-certificates \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN rm -rf /usr/include/mysql && ln -s /usr/include/mariadb /usr/include/mysql
+
+WORKDIR /app
+COPY . /app
+
+RUN cmake -S . -B build -G Ninja -DCMAKE_BUILD_TYPE=Release \
+    && cmake --build build -- -j$(nproc)
+
+# --- Runtime Stage ---
+FROM ubuntu:22.04 AS runtime
+ENV DEBIAN_FRONTEND=noninteractive
+
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    libssl3 ca-certificates libstdc++6 libmariadb3 libjsoncpp25 libuuid1 \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+COPY --from=builder /app/build/visione-backend     /app/visione-backend
+COPY --from=builder /app/build/openapi             /app/build/openapi
+COPY --from=builder /app/migrations                /app/migrations
+
+EXPOSE 5555
+
+RUN chown -R 1000:1000 /app
+USER 1000:1000
+
+ENTRYPOINT ["/app/visione-backend"]