Update Dockerfile

Dockerfile

@@ -10,16 +10,18 @@ COPY static/ /app/static
 COPY merge_sql_nosql.py merge_sql_nosql.py
 COPY app.py app.py
 
-# Install system dependencies + Microsoft ODBC Driver 17
+# Install system dependencies + Microsoft ODBC Driver 17 (modern method)
 RUN apt-get update && apt-get install -y \
     curl \
     apt-transport-https \
     gnupg \
+    lsb-release \
     unixodbc \
     unixodbc-dev \
     libodbc1 \
-    && curl https://packages.microsoft.com/keys/microsoft.asc | apt-key add - \
-    && curl https://packages.microsoft.com/config/debian/12/prod.list > /etc/apt/sources.list.d/mssql-release.list \
+    && curl https://packages.microsoft.com/keys/microsoft.asc | gpg --dearmor > /usr/share/keyrings/microsoft.gpg \
+    && echo "deb [signed-by=/usr/share/keyrings/microsoft.gpg] https://packages.microsoft.com/debian/12/prod bookworm main" \
+        > /etc/apt/sources.list.d/mssql-release.list \
     && apt-get update \
     && ACCEPT_EULA=Y apt-get install -y msodbcsql17 \
     && rm -rf /var/lib/apt/lists/*