Fix/local development (#101)

* **Remove Python SCSS compiler and development script**

- Deleted `compile_scss.py` and `dev.sh` scripts to clean up unused SCSS compilation and local development workflow.
- Streamlining project by removing legacy Python-based tooling. Clear shift toward alternative CSS build processes in workflows.

* Migrate SCSS compilation to Python-based workflow and simplify Dockerfile

- Replaced Node.js SCSS tools with libsass and introduced `scss_watcher.py` for automated SCSS compilation during development.
- Updated Dockerfile to use Python-based dependencies and removed redundant npm configuration.
- Cleaned up `package.json`, `requirements.txt`, and outdated scripts to streamline the project.
- Enhanced development workflow with a lightweight Python-based approach.

* Replace `python -m sass` with `pysassc` for SCSS compilation in development scripts

* **Refactor and streamline MkDocs workflows, footer, and blog structure**

- Removed outdated `deploy-preview-fix.yml` and `deploy-test.yml` workflows for cleanup.
- Enhanced `deploy-preview.yml`:
  - Expanded branch triggers to include `build/**`, `test/**`, and `preview/**`.
  - Improved `site_url` logic by standardizing URL formatting.
- Updated `mkdocs.yml` navigation to use consistent `index.md` file naming.
- Simplified footer template to use relative paths for internal links (e.g., `impressum/`, `datenschutz/`).
- Adjusted `mkdocs.sh` to ensure SCSS watcher includes `overrides`.
- Deleted outdated `Sequential Thinking` blog and branch documentation for better maintenance.

* Update to Python 3.13 and streamline MkDocs workflows

- Upgraded Dockerfile base image to `python:3.13-slim-bullseye` for consistency with the latest Python version.
- Consolidated MkDocs and plugin installation steps in `deploy-preview.yml`.
- Replaced Node.js SCSS tools with Python `pysassc` for CSS build process, removing unnecessary npm steps.

* Replace `mkdocs-lightbox` with `mkdocs-glightbox` and improve CSS build step in GitHub Actions workflow

- Updated `deploy-preview.yml` to switch from `mkdocs-lightbox` to `mkdocs-glightbox` for better compatibility and features.
- Enhanced CSS build logic to create the target directory (`docs/assets/css`) if it does not exist, ensuring a smoother workflow execution.

* Streamline deploy workflows and enhance CSS build process

- Added repository-specific condition to `deploy-live.yml` for improved workflow targeting.
- Consolidated MkDocs and plugin installation steps in `deploy-live.yml` to remove redundant tasks.
- Enhanced CSS build step to ensure target directory creation (`mkdir -p docs/assets/css`) in both workflows.

docker/mkdocs-material/Dockerfile

@@ -1,12 +1,43 @@
-FROM squidfunk/mkdocs-material:9.6.14
-RUN pip install mkdocs-macros-plugin
-RUN pip install mkdocs-glightbox
-RUN pip install mkdocs-include-markdown-plugin
-RUN pip install mkdocs-video
-RUN pip install mkdocs-rss-plugin
-RUN pip install mkdocs-snippets
-RUN pip install mkdocs-exclude
-RUN pip install mkdocs-git-revision-date-localized-plugin
-RUN pip install mkdocs-redirects
-RUN pip install mkdocs-literate-nav
-RUN pip install mkdocs-minify-plugin
+# Use a Python image based on Debian (Ubuntu is derived from Debian)
+FROM python:3.13-slim-bullseye
+
+# Set the working directory inside the container
+WORKDIR /docs
+
+# Set locale to avoid potential issues with C/C++ libraries
+ENV LANG C.UTF-8
+ENV LC_ALL C.UTF-8
+
+# Install system dependencies and Python packages in a single layer
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential \
+    curl \
+    git \
+    libcairo2 \
+    libffi-dev \
+    libgdk-pixbuf2.0-0 \
+    libpango-1.0-0 \
+    libpangocairo-1.0-0 \
+    shared-mime-info \
+    && rm -rf /var/lib/apt/lists/* \
+    && pip install --no-cache-dir \
+    cairosvg \
+    libsass \
+    mkdocs-exclude \
+    mkdocs-git-revision-date-localized-plugin \
+    mkdocs-glightbox \
+    mkdocs-include-markdown-plugin \
+    mkdocs-literate-nav \
+    mkdocs-macros-plugin \
+    mkdocs-material==9.6.14 \
+    mkdocs-material[imaging] \
+    mkdocs-minify-plugin \
+    mkdocs-redirects \
+    mkdocs-rss-plugin \
+    mkdocs-snippets \
+    mkdocs-video \
+    watchdog
+
+
+# No need for WORKDIR /docs or COPY package.json ./ or npm install related steps anymore
+# as we're using libsass and not Node.js/npm.