Update pinning, reduce image size, configure poetry to not use venv

Dockerfile

@@ -12,17 +12,20 @@ ENV DEBIAN_FRONTEND=noninteractive
 # https://packages.ubuntu.com/search?suite=focal&section=all&arch=any&keywords=curl&searchon=names
 RUN ln -fs /usr/share/zoneinfo/UCT /etc/localtime \
     && apt-get update -y \
-    && apt-get install -y --fix-missing \
+    && apt-get install -f -y --no-install-recommends \
         build-essential=12.8ubuntu1 \
         curl=7.68.0-1ubuntu2.7 \
         ffmpeg=7:4.2.4-1ubuntu0.1 \
         opus-tools=0.1.10-1 \
         optipng=0.7.7-1 \
+        python-pip-whl=20.0.2-5ubuntu1.5 \
         python3=3.8.2-0ubuntu2 \
+        python3-pip=20.0.2-5ubuntu1.5 \
         python3-distutils=3.8.10-0ubuntu1~20.04 \
         python3-apt=2.0.0ubuntu0.20.04.3 \
         tzdata=2021e-0ubuntu0.20.04 \
-    webp=0.6.1-2ubuntu0.20.04.1
+        webp=0.6.1-2ubuntu0.20.04.1 \
+    && apt-get upgrade -y
 
 WORKDIR /tmp
 
@@ -38,6 +41,7 @@ RUN curl -LS -o mozjpeg.deb "https://nexus.nulloctet.com/repository/public/mozjp
 ARG POETRY_VERSION="1.1.12"
 RUN curl -sSL "https://raw.githubusercontent.com/python-poetry/poetry/${POETRY_VERSION}/get-poetry.py" | python3 -
 ENV PATH="${PATH}:/root/.poetry/bin"
+RUN poetry config virtualenvs.create false
 
 WORKDIR /app
 
@@ -51,6 +55,7 @@ RUN poetry install
 RUN apt-get remove -y \
         build-essential \
         curl \
+        python3-pip \
     && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /bin