Bump Docker images use for documentation to Alpine 3.20

docs/check.Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.18 as alpine
+FROM alpine:3.20
 
 RUN apk --no-cache --no-progress add \
     build-base \

docs/docs.Dockerfile

@@ -1,10 +1,12 @@
-FROM alpine:3.14
+FROM alpine:3.20
 
-ENV PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/root/.local/bin
+ENV PATH="${PATH}:/venv/bin"
 
 COPY requirements.txt /mkdocs/
 WORKDIR /mkdocs
 VOLUME /mkdocs
 
 RUN apk --no-cache --no-progress add py3-pip gcc musl-dev python3-dev \
-  && pip3 install --user -r requirements.txt
+  && python3 -m venv /venv \
+  && source /venv/bin/activate \
+  && pip3 install -r requirements.txt

docs/requirements.txt

@@ -1,45 +1,23 @@
-mkdocs==1.2.2
+markdown-include==0.5.1
+mkdocs==1.2.4
+mkdocs-exclude==1.0.2
 mkdocs-traefiklabs>=100.0.7
 
-appdirs==1.4.4
+click==8.1.7
-CacheControl==0.12.6
+colorama==0.4.6
-certifi==2020.12.5
+ghp-import==2.1.0
-chardet==4.0.0
+importlib_metadata==7.1.0
-click==8.0.4
+Jinja2==3.1.3
-colorama==0.4.4
-contextlib2==0.6.0
-distlib==0.3.1
-distro==1.5.0
-ghp-import==2.0.2
-html5lib==1.1
-idna==3.2
-importlib-metadata==4.11.3
-Jinja2==3.0.0
-lockfile==0.12.2
 Markdown==3.3.6
-markdown-include==0.5.1
+MarkupSafe==2.1.5
-MarkupSafe==2.1.1
 mergedeep==1.3.4
-mkdocs-bootswatch==1.0
+mkdocs-material-extensions==1.3.1
-mkdocs-exclude==1.0.2
+packaging==24.0
-mkdocs-material-extensions==1.0.3
+Pygments==2.18.0
-msgpack==1.0.2
-ordered-set==4.0.2
-packaging==20.9
-pep517==0.10.0
-progress==1.5
-Pygments==2.11.2
 pymdown-extensions==7.0
-pyparsing==2.4.7
+python-dateutil==2.9.0.post0
-python-dateutil==2.8.2
 PyYAML==6.0.1
-pyyaml-env-tag==0.1
+pyyaml_env_tag==0.1
-requests==2.25.1
+six==1.16.0
-retrying==1.3.3
+watchdog==4.0.0
-six==1.15.0
+zipp==3.18.1
-toml==0.10.2
-urllib3==1.26.5
-watchdog==2.1.7
-webencodings==0.5.1
-zipp==3.7.0
-

docs/runtime.txt

@@ -1 +0,0 @@
-3.7