fixes/updates. use pydata theme. use drawio extension in devcontainer

Dockerfile

@@ -1,25 +1,29 @@
-FROM node:14-alpine
+FROM python:3.11-bullseye
 
-# Create app directory
-WORKDIR /usr/src/app
+ADD pip-requirements.txt /tmp/pip-requirements.txt
+RUN pip install -r /tmp/pip-requirements.txt \
+    && rm /tmp/pip-requirements.txt
 
-# Install app dependencies
-# A wildcard is used to ensure both package.json AND package-lock.json are copied
-# where available (npm@5+)
-COPY package*.json ./
-
-RUN npm install
-
-RUN apk add --no-cache python3 bash \
-    && ln -sf python3 /usr/bin/python
+# install drawio for doc diagram gen
+ENV DRAWIO_VERSION "21.1.2"
+RUN apt update \
+    && apt install -yq --no-install-recommends \
+        xvfb \
+        wget \
+        libnotify4 \
+        libgbm1 \
+        libasound2 \
+        libxss1 \
+        libsecret-1-0 \
+    && wget https://github.com/jgraph/drawio-desktop/releases/download/v${DRAWIO_VERSION}/drawio-amd64-${DRAWIO_VERSION}.deb \
+    && apt install -y ./drawio-amd64-${DRAWIO_VERSION}.deb \
+    && rm -rf /var/lib/apt/lists/* \
+    && rm -rf drawio-amd64-${DRAWIO_VERSION}.deb
+ENV XVFB_DISPLAY ":42"
 
 # Bundle app source
-COPY . .
-
-RUN python3 -m ensurepip \
-    && pip3 install --no-cache --upgrade pip setuptools \
-    && pip3 install -r pip-requirements.txt
+# COPY . .
+# RUN ablog build
 
 EXPOSE 8090
-
-CMD [ "npm", "start" ]
+CMD [ "ablog", "serve", "-p", "8090" ]