Refactor Dockerfiles to `utils/docker` (#7510)

Dockerfile → utils/docker/Dockerfile

@@ -23,11 +23,10 @@ COPY . /usr/src/app
 RUN git clone https://github.com/ultralytics/yolov5 /usr/src/yolov5
 
 # Downloads to user config dir
-ADD https://ultralytics.com/assets/Arial.ttf /root/.config/Ultralytics/
+ADD https://ultralytics.com/assets/Arial.ttf https://ultralytics.com/assets/Arial.Unicode.ttf /root/.config/Ultralytics/
 
 # Set environment variables
 ENV OMP_NUM_THREADS=8
-# ENV HOME=/usr/src/app
 
 
 # Usage Examples -------------------------------------------------------------------------------------------------------

utils/docker/Dockerfile-cpu

+# YOLOv5 🚀 by Ultralytics, GPL-3.0 license
+
+# Start FROM Ubuntu image https://hub.docker.com/_/ubuntu
+FROM ubuntu:latest
+
+# Install linux packages
+RUN apt update
+RUN DEBIAN_FRONTEND=noninteractive TZ=Etc/UTC apt install -y tzdata
+RUN apt install -y python3-pip git zip curl htop screen libgl1-mesa-glx libglib2.0-0
+RUN alias python=python3
+
+# Install python dependencies
+COPY requirements.txt .
+RUN python3 -m pip install --upgrade pip
+RUN pip install --no-cache -r requirements.txt albumentations gsutil notebook \
+    coremltools onnx onnx-simplifier onnxruntime openvino-dev tensorflow-cpu tensorflowjs \
+    torch==1.11.0+cpu torchvision==0.12.0+cpu -f https://download.pytorch.org/whl/cpu/torch_stable.html
+
+# Create working directory
+RUN mkdir -p /usr/src/app
+WORKDIR /usr/src/app
+
+# Copy contents
+COPY . /usr/src/app
+RUN git clone https://github.com/ultralytics/yolov5 /usr/src/yolov5
+
+# Downloads to user config dir
+ADD https://ultralytics.com/assets/Arial.ttf https://ultralytics.com/assets/Arial.Unicode.ttf /root/.config/Ultralytics/
+
+
+# Usage Examples -------------------------------------------------------------------------------------------------------
+
+# Build and Push
+# t=ultralytics/yolov5:latest-cpu && sudo docker build -t $t . && sudo docker push $t
+
+# Pull and Run
+# t=ultralytics/yolov5:latest-cpu && sudo docker pull $t && sudo docker run -it --ipc=host -v "$(pwd)"/datasets:/usr/src/datasets $t