Add CPU only Docker image (#1573)

Co-authored-by: Reuben Morais <reuben.morais@gmail.com>

.github/workflows/docker.yaml

@@ -14,6 +14,9 @@ jobs:
     strategy:
       matrix:
         arch: ["amd64"]
+        base:
+        - "nvcr.io/nvidia/pytorch:22.03-py3" # GPU enabled
+        - "ubuntu:20.04" # CPU only
     steps:
       - uses: actions/checkout@v2
       - name: Log in to the Container registry
@@ -28,6 +31,11 @@ jobs:
           set -ex
           base="ghcr.io/coqui-ai/tts"
           tags="" # PR build
+
+          if [[ ${{ matrix.base }} = "ubuntu:20.04" ]]; then
+            base="ghcr.io/coqui-ai/tts-cpu"
+          fi
+
           if [[ "${{ startsWith(github.ref, 'refs/heads/') }}" = "true" ]]; then
             # Push to branch
             github_ref="${{ github.ref }}"
@@ -53,4 +61,5 @@ jobs:
           context: .
           platforms: linux/${{ matrix.arch }}
           push: ${{ github.event_name == 'push' }}
-          tags: ${{ steps.compute-tag.outputs.tags }}
+          build-args: "BASE=${{ matrix.base }}"
+          tags: ${{ steps.compute-tag.outputs.tags }}

Dockerfile

@@ -1,6 +1,14 @@
-FROM nvcr.io/nvidia/pytorch:22.03-py3
-RUN apt-get update && apt-get install -y --no-install-recommends espeak espeak-ng && rm -rf /var/lib/apt/lists/*
+ARG BASE=nvcr.io/nvidia/pytorch:22.03-py3
+FROM ${BASE}
+RUN apt-get update && apt-get install -y --no-install-recommends gcc g++ make  python3 python3-dev python3-pip python3-venv python3-wheel espeak espeak-ng libsndfile1-dev && rm -rf /var/lib/apt/lists/*
 RUN pip install llvmlite --ignore-installed
+
+# Create and activate virtual env
+ENV VIRTUAL_ENV=/venv
+RUN python3 -m venv $VIRTUAL_ENV
+ENV PATH="$VIRTUAL_ENV/bin:$PATH"
+RUN pip install -U pip setuptools wheel
+
 WORKDIR /root
 COPY requirements.txt /root
 COPY requirements.dev.txt /root
@@ -9,4 +17,4 @@ RUN ["/bin/bash", "-c", "pip install -r <(cat requirements.txt requirements.dev.
 COPY . /root
 RUN make install
 ENTRYPOINT ["tts"]
-CMD ["--help"]
+CMD ["--help"]