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.

tailwind.config.js

@@ -1,14 +1,14 @@
-/** @type {import('tailwindcss').Config} */
-module.exports = {
-  content: [
-    "./templates/**/*.html",
-    "./static/src/**/*.js",
-  ],
-  theme: {
-    extend: {},
-  },
-  plugins: [require("daisyui")],
-  daisyui: {
-    themes: ["light", "dark"],
-  },
+/** @type {import('tailwindcss').Config} */
+module.exports = {
+  content: [
+    "./templates/**/*.html",
+    "./static/src/**/*.js",
+  ],
+  theme: {
+    extend: {},
+  },
+  plugins: [require("daisyui")],
+  daisyui: {
+    themes: ["light", "dark"],
+  },
 }