docs: add code for building docs in ci

docs/_build/Dockerfile

@@ -0,0 +1,12 @@
+FROM python:3.10-alpine
+
+WORKDIR /usr/src/app
+
+COPY docs/_build/requirements.txt .
+
+RUN apk add --no-cache bash yaml && \
+  pip install --no-cache-dir -r requirements.txt
+
+COPY docs/_build/entrypoint /bin/entrypoint
+
+ENTRYPOINT [ "/bin/entrypoint" ]

docs/_build/entrypoint

@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+set -eo pipefail
+
+write-mkdocs() {
+  if [[ -f /usr/src/source/contrib/write-mkdocs ]]; then
+    if ! python /usr/src/source/contrib/write-mkdocs; then
+      exit 0
+    fi
+  fi
+}
+
+main() {
+  declare CMD="$1" ARGS=("${@:2}")
+
+  if [[ "$CMD" == "build" ]]; then
+    write-mkdocs
+    mkdocs build
+    site_dir="$(grep site_dir mkdocs.yml | awk '{print $2}')"
+    cp -r "/usr/src/app/${site_dir}" "/usr/src/source/${site_dir}"
+
+    return $?
+  fi
+
+  if [[ "$CMD" == "deps" ]]; then
+    pip freeze
+    return $?
+  fi
+
+  if [[ "$CMD" == "serve" ]]; then
+    write-mkdocs
+    mkdocs serve -a 0.0.0.0:3487
+    return $?
+  fi
+
+  "$CMD" "${ARGS[@]}"
+}
+
+main "$@"

docs/_build/requirements.txt

@@ -0,0 +1,23 @@
+beautifulsoup4==4.11.1
+click==8.1.3
+ghp-import==2.1.0
+importlib-metadata==4.12.0
+Jinja2==3.1.2
+Markdown==3.3.7
+MarkupSafe==2.1.1
+mergedeep==1.3.4
+mkdocs==1.3.1
+mkdocs-material==8.4.2
+mkdocs-material-extensions==1.0.3
+packaging==21.3
+Pygments==2.13.0
+pymdown-extensions==9.5
+pyparsing==3.0.9
+python-dateutil==2.8.2
+PyYAML==6.0
+pyyaml_env_tag==0.1
+six==1.16.0
+soupsieve==2.3.2.post1
+watchdog==2.1.9
+zipp==3.8.1
+mkdocs-exclude