DOP-3298: Install snooty parser from prebuilt images

Dockerfile

@@ -12,20 +12,18 @@ RUN npm run build
 FROM ubuntu:20.04
 ARG SNOOTY_PARSER_VERSION=0.13.13
 ARG SNOOTY_FRONTEND_VERSION=0.13.32
-ARG FLIT_VERSION=3.0.0
 ARG NPM_BASE_64_AUTH
 ARG NPM_EMAIL
 ENV DEBIAN_FRONTEND=noninteractive
-ENV FLIT_ROOT_INSTALL=1
 
 # install legacy build environment for docs
 RUN apt-get -o Acquire::Check-Valid-Until=false update
 RUN apt-get -y install libpython2.7-dev python2.7 git rsync
-RUN apt-get -y install curl
+RUN apt-get -y install curl unzip
 RUN curl https://bootstrap.pypa.io/pip/2.7/get-pip.py --output get-pip.py
 RUN python2.7 get-pip.py
 RUN pip install requests virtualenv virtualenvwrapper py-dateutil
-RUN python2.7 -m pip install python-dateutil 
+RUN python2.7 -m pip install python-dateutil
 RUN virtualenv /venv
 RUN /venv/bin/pip install --upgrade --force setuptools
 RUN /venv/bin/pip install -r https://raw.githubusercontent.com/mongodb/docs-tools/master/giza/requirements.txt
@@ -37,7 +35,7 @@ RUN apt-get -y install git pkg-config libxml2-dev
 RUN python3 -m pip install https://github.com/mongodb/mut/releases/download/v0.10.2/mut-0.10.2-py3-none-any.whl
 
 
-ENV PATH="${PATH}:/home/docsworker-xlarge/.local/bin:/usr/local/lib/python2.7/dist-packages/virtualenv/bin"
+ENV PATH="${PATH}:/home/docsworker-xlarge/.local/bin:/home/docsworker-xlarge/.local/snooty/:/usr/local/lib/python2.7/dist-packages/virtualenv/bin"
 
 # get node 14
 # https://gist.github.com/RinatMullayanov/89687a102e696b1d4cab
@@ -60,10 +58,9 @@ WORKDIR /home/docsworker-xlarge
 RUN curl https://raw.githubusercontent.com/mongodb/docs-worker-pool/meta/makefiles/shared.mk -o shared.mk
 
 # install snooty parser
-RUN git clone -b v${SNOOTY_PARSER_VERSION} --depth 1 https://github.com/mongodb/snooty-parser.git  \
-    && python3 -m pip install pip==20.2 flit==${FLIT_VERSION}                                      \
-    && cd snooty-parser                                                                            \
-    && python3 -m flit install
+RUN curl -OL "https://github.com/mongodb/snooty-parser/releases/download/v${SNOOTY_PARSER_VERSION}/snooty-v${SNOOTY_PARSER_VERSION}-linux_x86_64.zip" \
+    && mkdir -p ~/.local/snooty \
+    && unzip "snooty-v${SNOOTY_PARSER_VERSION}-linux_x86_64.zip" -d ~/.local/snooty
 
 # install snooty frontend and docs-tools
 RUN git clone -b v${SNOOTY_FRONTEND_VERSION} --depth 1 https://github.com/mongodb/snooty.git       \