Updating the Dockerfile used for the serving image to use bazel version 6.1.0 and python 3.8, in order for it to be compatible with tensorflow-serving.

PiperOrigin-RevId: 552508492

Author: zoyahav

struct2tensor/tools/tf_serving_docker/Dockerfile

@@ -56,16 +56,16 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/*
 
-# Install python 3.7.
+# Install python 3.8.
 RUN add-apt-repository ppa:deadsnakes/ppa && \
     apt-get update && apt-get install -y \
-    python3.7 python3.7-dev python3-pip python3.7-venv && \
+    python3.8 python3.8-dev python3-pip python3.8-venv && \
     rm -rf /var/lib/apt/lists/* && \
-    python3.7 -m pip install pip --upgrade && \
-    update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.7 0
+    python3.8 -m pip install pip --upgrade && \
+    update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.8 0
 
-# Make python3.7 the default python version
-RUN update-alternatives --install /usr/bin/python python /usr/bin/python3.7 0
+# Make python3.8 the default python version
+RUN update-alternatives --install /usr/bin/python python /usr/bin/python3.8 0
 
 RUN curl -fSsL -O https://bootstrap.pypa.io/get-pip.py && \
     python3 get-pip.py && \
@@ -74,7 +74,7 @@ RUN curl -fSsL -O https://bootstrap.pypa.io/get-pip.py && \
 RUN pip3 --no-cache-dir install --upgrade numpy
 
 # Set up Bazel
-ENV BAZEL_VERSION 5.3.0
+ENV BAZEL_VERSION 6.1.0
 WORKDIR /bazel
 RUN curl -fSsL -O https://github.com/bazelbuild/bazel/releases/download/$BAZEL_VERSION/bazel-$BAZEL_VERSION-installer-linux-x86_64.sh && \
     chmod +x bazel-*.sh && \