Re-export cloud build docker file

ci/ubuntu_floor/Dockerfile

@@ -0,0 +1,70 @@
+# This Dockerfile is used to create a container with compilers and tools
+# building the CEL C++ library on GitHub.
+#
+# To update a new version of this container, use gcloud. You may need to run
+# `gcloud auth login` and `gcloud auth configure-docker` first.
+#
+# Note, if you need to run docker using `sudo` use the following commands
+# instead:
+#
+#     sudo gcloud auth login --no-launch-browser
+#     sudo gcloud auth configure-docker
+#
+# Run the following command from the root of the CEL repository:
+#
+#     gcloud builds submit --region=us -t gcr.io/cel-analysis/cel-cpp/ubuntu_floor .
+#
+# Once complete get the sha256 digest from the output using the following
+# command:
+#
+#     gcloud artifacts versions list --package=cel-cpp/ubuntu_floor --repository=gcr.io \
+#       --location=us
+#
+# The cloudbuild.yaml file must be updated to use the new digest like so:
+#
+#     - name: 'gcr.io/cel-analysis/cel-cpp/ubuntu_floor@<SHA256>'
+FROM gcr.io/cloud-marketplace/google/ubuntu2204:latest
+
+# Install Bazel prerequesites and required tools.
+# See https://docs.bazel.build/versions/master/install-ubuntu.html
+# See https://github.com/google/oss-policies-info/blob/main/foundational-cxx-support-matrix.md
+RUN apt-get update && apt-get upgrade -y && \
+    DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+    bash \
+    ca-certificates \
+      git \
+      libssl-dev \
+      make \
+      pkg-config \
+      python3 \
+      unzip \
+      wget \
+      zip \
+      zlib1g-dev \
+      default-jdk-headless \
+      clang-14 \
+      gcc-10 g++-10 \
+      tzdata \
+      && apt-get clean
+
+# Install Bazelisk.
+# https://github.com/bazelbuild/bazelisk/releases
+ARG BAZELISK_URL="https://github.com/bazelbuild/bazelisk/releases/download/v1.27.0/bazelisk-amd64.deb"
+ARG BAZELISK_CHKSUM="d8b00ea975c823e15263c80200ac42979e17368547fbff4ab177af035badfa83"
+ADD ${BAZELISK_URL} /tmp/bazelisk.deb
+
+ENV BAZELISK_CHKSUM=${BAZELISK_CHKSUM}
+RUN echo "${BAZELISK_CHKSUM} */tmp/bazelisk.deb" | sha256sum --check
+
+RUN apt-get install /tmp/bazelisk.deb
+
+RUN mkdir -p /workspace
+RUN mkdir -p /bazel
+
+RUN USE_BAZEL_VERSION=8.7.0 bazelisk help
+RUN USE_BAZEL_VERSION=7.3.2 bazelisk help
+
+ENV CC=gcc-10
+ENV CXX=g++-10
+
+ENTRYPOINT ["/usr/bin/bazelisk"]