add more build examples

build/Dockerfile.ubuntu-build-with-tracer

@@ -0,0 +1,38 @@
+ARG  REGISTRY=docker.io
+ARG  BASE_IMAGE=library/ubuntu:20.04
+
+ARG  ONLYOFFICE_IMAGE=onlyoffice/documentserver:7.5
+
+FROM ${REGISTRY}/${BASE_IMAGE} as base
+
+FROM ${REGISTRY}/${ONLYOFFICE_IMAGE} as runtime-base
+RUN  apt update && apt install libseccomp2 -y && rm -rf /var/apt
+
+FROM base as builder-base
+RUN  ln -svf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && apt update && apt install build-essential libseccomp-dev curl pkg-config -y
+RUN  curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | bash -s - -y
+COPY Cargo.toml Cargo.lock build.rs /src/
+COPY src /src/src
+COPY x2t-sandbox-rulegen /src/x2t-sandbox-rulegen
+WORKDIR /src
+
+FROM builder-base as tracer-builder
+RUN  /root/.cargo/bin/cargo build --release --features tracing-mode
+
+FROM runtime-base as tracer-generate-syscalls
+COPY data /data
+COPY --from=tracer-builder /src/target/release/x2t-sandbox /usr/local/bin/x2t-sandbox
+RUN  bash -c 'set -euo pipefail; for filename in $(ls /data/ | grep "\.xml$"); do /usr/local/bin/x2t-sandbox -l $filename.out /var/www/onlyoffice/documentserver/server/FileConverter/bin/x2t /data/$filename; done'
+RUN  cat *.out | sort | uniq > x2t-syscalls.txt
+
+FROM builder-base as sandbox-builder
+COPY --from=tracer-generate-syscalls /x2t-syscalls.txt /src/x2t-syscalls.txt
+RUN  /root/.cargo/bin/cargo build --release --features tracing-mode
+
+FROM runtime-base as onlyoffice-output
+COPY --from=sandbox-builder /src/target/release/x2t-sandbox /usr/local/bin/x2t-sandbox
+
+FROM base as copy-to-data
+COPY --from=sandbox-builder /src/target/release/x2t-sandbox /x2t-sandbox
+CMD  ["cp", "-v", "x2t-sandbox", "/data/x2t-sandbox"]
+