[docker] Update Python to 3.8.10

Dockerfile

@@ -1,5 +1,5 @@
 # For more information, please refer to https://aka.ms/vscode-docker-python
-FROM python:3.8.7-slim-buster
+FROM python:3.8.10-slim-buster
 
 # Keeps Python from generating .pyc files in the container
 ENV PYTHONDONTWRITEBYTECODE 1
@@ -17,7 +17,7 @@ SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 RUN apt-get update -y && apt-get install -y --no-install-recommends \
     # psutil:
     "gcc=4:8.3.0-1" \
-    "libtiff-dev=4.1.0+git191117-2~deb10u1" \
+    "libtiff-dev=4.1.0+git191117-2~deb10u2" \
     "openslide-tools=3.4.1+dfsg-4" \
     && rm -rf /var/lib/apt/lists/* \
     && python3 -m pip install poetry \