Install poetry via pipx in Dockerfile

- https://python-poetry.org/docs/#ci-recommendations
- https://github.com/pypa/pipx#on-linux

packages/examples/cvat/exchange-oracle/Dockerfile

@@ -3,15 +3,16 @@ FROM python:3.10
 WORKDIR /app
 
 RUN apt-get update -y && \
-    apt-get install -y jq ffmpeg libsm6 libxext6 && \
-    pip install --no-cache poetry
+    apt-get install -y jq ffmpeg libsm6 libxext6 pipx && \
+    pipx install --pip-args='--no-cache' poetry==1.8.4
 
 COPY pyproject.toml poetry.lock ./
 
 RUN poetry config virtualenvs.create false \
     && poetry install --no-interaction --no-ansi --no-root \
     && poetry cache clear pypi --all
 
+# TODO: Consider moving to multistage builds and system cache for faster builds and smaller images.
 COPY . .
 
 CMD ["sh", "./bin/start_dev.sh"]

packages/examples/cvat/recording-oracle/Dockerfile

@@ -3,15 +3,16 @@ FROM python:3.10
 WORKDIR /app
 
 RUN apt-get update -y && \
-    apt-get install -y jq ffmpeg libsm6 libxext6 && \
-    pip install --no-cache poetry
+    apt-get install -y jq ffmpeg libsm6 libxext6 pipx && \
+    pipx install --pip-args='--no-cache' poetry==1.8.4
 
 COPY pyproject.toml poetry.lock ./
 
 RUN poetry config virtualenvs.create false \
     && poetry install --no-interaction --no-ansi --no-root \
     && poetry cache clear pypi --all
 
+# TODO: Consider moving to multistage builds and system cache for faster builds and smaller images.
 COPY . .
 
 CMD ["sh", "./bin/start_dev.sh"]