Introduce code from Rust monorepo. This is a mess

tts/NeMo/examples/asr/asr_webapp/Dockerfile

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+# syntax=docker/dockerfile:experimental
+
+# Copyright (c) 2021, NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+ARG BASE_IMAGE=nvcr.io/nvidia/nemo:1.0.0rc1
+
+# build an image that includes only the nemo dependencies, ensures that dependencies
+# are included first for optimal caching, and useful for building a development
+# image (by specifying build target as `nemo-deps`)
+FROM ${BASE_IMAGE} as nemo-deps
+
+# copy asr service source into a temp directory
+WORKDIR /tmp/nemo-service
+COPY . .
+
+# override nemo installation with dependency from requirements.txt
+RUN /bin/echo "export BASE_IMAGE=${BASE_IMAGE}" >> /root/.bashrc
+RUN cd /tmp/nemo-service && pip install -r "requirements.txt"
+
+# copy webapp into container for end user
+WORKDIR /workspace/nemo-service
+COPY . /workspace/nemo-service/
+
+# pre-import some asr dependencies which would take time on each worker
+RUN python -c "import nemo.collections.asr as nemo_asr"
+
+# expose port 8000 and launch gunicorn
+EXPOSE 8000
+CMD ["gunicorn", "wsgi:app"]