fix: docker nightly build failed (#1727)

Co-authored-by: Hien To <tominhhien97@gmail.com>

Author: hiento09

docker/Dockerfile

@@ -56,7 +56,7 @@ COPY ./docs/static/openapi/cortex.json /app/docs/static/openapi/cortex.json
 RUN cd engine && make configure-vcpkg && make build CMAKE_EXTRA_FLAGS="-DCORTEX_CPP_VERSION=${CORTEX_CPP_VERSION} -DCMAKE_BUILD_TEST=OFF -DCMAKE_TOOLCHAIN_FILE=vcpkg/scripts/buildsystems/vcpkg.cmake ${CMAKE_EXTRA_FLAGS}"
 
 # Stage 3: Runtime
-
+FROM common as runtime
 WORKDIR /app
 COPY --from=build /app/engine/build/cortex /usr/local/bin/cortex
 COPY --from=build /app/engine/build/cortex-server /usr/local/bin/cortex-server