[docker] Build docker in Travis PR & Fix image build failing (#9787)

Co-authored-by: Ian Rodney <ian.rodney@gmail.com>

docker/base-deps/Dockerfile

@@ -1,6 +1,8 @@
 # The base-deps Docker image installs main libraries needed to run Ray
 
 FROM ubuntu:focal
+ENV TZ=America/Los_Angeles
+ARG DEBIAN_FRONTEND=noninteractive
 RUN apt-get update -y && apt-get upgrade -y \
     && apt-get install -y \
         git \
@@ -9,13 +11,11 @@ RUN apt-get update -y && apt-get upgrade -y \
         build-essential \
         curl \
         unzip \
-        libgtk2.0-dev \
-        zlib1g-dev \
-        libgl1-mesa-dev \
         tmux \
         screen \
         rsync \
         openssh-client \
+    && rm -rf /var/lib/apt/lists/* \
     && apt-get clean \
     && wget \
         --quiet "https://repo.anaconda.com/miniconda/Miniconda3-latest-Linux-x86_64.sh" \
@@ -35,4 +35,5 @@ RUN apt-get update -y && apt-get upgrade -y \
     # AttributeError: 'numpy.ufunc' object has no attribute '__module__'
     && $HOME/anaconda3/bin/pip uninstall -y dask
 
-ENV PATH "$HOME/anaconda3/bin:$PATH"
+# TODO(ilr) $HOME seems to point to result in "" instead of "/root"
+ENV PATH "/root/anaconda3/bin:$PATH"