Refactor Docker setup and add mock data support

- Updated .dockerignore and .gitignore for better file management.
- Introduced .env.example for environment variable configuration.
- Added docker-compose.dev.yml for development with mock data and live reload.
- Enhanced Dockerfile to include necessary dependencies and entrypoint script.
- Created mock_data.py to provide sample data for testing without OpenStack/Prometheus.
- Added unit tests for template filters in dashboard.
- Cleaned up various files for consistency and improved readability.

Dockerfile

@@ -1,32 +1,37 @@
-FROM alpine:3 AS build
-
-RUN apk update && \
-    apk add --no-cache --virtual .build-deps \
-    ca-certificates gcc postgresql-dev linux-headers musl-dev \
-    libffi-dev jpeg-dev zlib-dev \
-    git bash build-base python3-dev
-
-RUN python3 -m venv /venv
-ENV PATH "/venv/bin:$PATH"
-COPY ./requirements.txt /
-RUN pip install -r /requirements.txt
-
-
-FROM alpine:3
-
-ENV LANG C.UTF-8
-ENV LC_ALL C.UTF-8
-
-ENV PYTHONUNBUFFERED 1
-ENV PATH "/venv/bin:$PATH"
-
-RUN apk add --no-cache --update python3
-
-COPY --from=build /venv /venv
-
-RUN mkdir /app
-WORKDIR /app
-COPY ./ /
-
-ENTRYPOINT ["/docker-entrypoint.sh"]
-CMD [ "python", "manage.py", "runserver", "0.0.0.0:8000" ]
+FROM alpine:3 AS build
+
+RUN apk update && \
+    apk add --no-cache --virtual .build-deps \
+    ca-certificates gcc postgresql-dev linux-headers musl-dev \
+    libffi-dev jpeg-dev zlib-dev \
+    git bash build-base python3-dev \
+    dos2unix
+
+RUN python3 -m venv /venv
+ENV PATH "/venv/bin:$PATH"
+COPY ./requirements.txt /
+RUN pip install -r /requirements.txt
+
+COPY ./docker-entrypoint.sh /docker-entrypoint.sh
+RUN dos2unix /docker-entrypoint.sh && \
+    chmod +x /docker-entrypoint.sh
+
+
+FROM alpine:3
+
+ENV LANG C.UTF-8
+ENV LC_ALL C.UTF-8
+
+ENV PYTHONUNBUFFERED 1
+ENV PATH "/venv/bin:$PATH"
+
+RUN apk add --no-cache --update python3 curl
+
+COPY --from=build /venv /venv
+COPY --from=build /docker-entrypoint.sh /docker-entrypoint.sh
+
+WORKDIR /app
+COPY . /app
+
+ENTRYPOINT ["/docker-entrypoint.sh"]
+CMD ["python3", "manage.py", "runserver", "0.0.0.0:8000"]