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.

dashboard/mock_data.py

@@ -0,0 +1,115 @@
+"""Mock context for dashboard when USE_MOCK_DATA is enabled (no OpenStack/Prometheus)."""
+import json
+
+
+def get_mock_context():
+    """Return a context dict with the same structure as collect_context(), render-ready."""
+    hosts_total = 6
+    pcpu_total = 48
+    pcpu_usage = 12.5
+    vcpu_allocated = 96
+    vcpu_overcommit_max = 2.0
+    pram_total = 256 * 1024**3  # 256 GB in bytes
+    pram_usage = 120 * 1024**3
+    vram_allocated = 192 * 1024**3
+    vram_overcommit_max = 1.5
+    vm_count = 24
+    vm_active = 22
+
+    vcpu_total = pcpu_total * vcpu_overcommit_max
+    vram_total = pram_total * vram_overcommit_max
+
+    # Two sample audits with serialized fields for JS
+    host_labels = ["compute-0", "compute-1", "compute-2", "compute-3", "compute-4", "compute-5"]
+    cpu_current = [45.2, 38.1, 52.0, 41.3, 29.8, 48.5]
+    cpu_projected = [42.0, 40.0, 48.0, 44.0, 35.0, 46.0]
+
+    audits = [
+        {
+            "id": "mock-audit-uuid-1",
+            "name": "Mock audit (balanced)",
+            "created_at": "2025-02-01T10:00:00",
+            "strategy": "Balanced",
+            "goal": "BALANCED",
+            "type": "ONESHOT",
+            "scope": "Full Cluster",
+            "cpu_weight": "1.0",
+            "ram_weight": "1.0",
+            "migrations": json.dumps([
+                {
+                    "instanceName": "instance-1",
+                    "source": "compute-0",
+                    "destination": "compute-3",
+                    "flavor": "m1.small",
+                    "impact": "Low",
+                }
+            ]),
+            "host_labels": json.dumps(host_labels),
+            "cpu_current": json.dumps(cpu_current),
+            "cpu_projected": json.dumps(cpu_projected),
+        },
+        {
+            "id": "mock-audit-uuid-2",
+            "name": "Mock audit (workload consolidation)",
+            "created_at": "2025-02-02T14:30:00",
+            "strategy": "Workload consolidation",
+            "goal": "WORKLOAD_CONSOLIDATION",
+            "type": "ONESHOT",
+            "scope": "Full Cluster",
+            "cpu_weight": "1.0",
+            "ram_weight": "1.0",
+            "migrations": json.dumps([]),
+            "host_labels": json.dumps(host_labels),
+            "cpu_current": json.dumps(cpu_current),
+            "cpu_projected": json.dumps([40.0, 42.0, 50.0, 43.0, 36.0, 45.0]),
+        },
+    ]
+
+    return {
+        "region": {
+            "name": "mock-region",
+            "hosts_total": hosts_total,
+        },
+        "pcpu": {
+            "total": pcpu_total,
+            "usage": pcpu_usage,
+            "free": pcpu_total - pcpu_usage,
+            "used_percentage": pcpu_usage / pcpu_total * 100,
+        },
+        "vcpu": {
+            "total": int(vcpu_total),
+            "allocated": vcpu_allocated,
+            "free": int(vcpu_total) - vcpu_allocated,
+            "allocated_percentage": vcpu_allocated / vcpu_total * 100,
+            "overcommit_ratio": vcpu_allocated / pcpu_total,
+            "overcommit_max": vcpu_overcommit_max,
+        },
+        "pram": {
+            "total": pram_total,
+            "usage": pram_usage,
+            "free": pram_total - pram_usage,
+            "used_percentage": pram_usage / pram_total * 100,
+        },
+        "vram": {
+            "total": vram_total,
+            "allocated": vram_allocated,
+            "free": vram_total - vram_allocated,
+            "allocated_percentage": vram_allocated / vram_total * 100,
+            "overcommit_ratio": vram_allocated / pram_total,
+            "overcommit_max": vram_overcommit_max,
+        },
+        "vm": {
+            "count": vm_count,
+            "active": vm_active,
+            "stopped": vm_count - vm_active,
+            "avg_cpu": vcpu_allocated / vm_count if vm_count else 0,
+            "avg_ram": vram_allocated / vm_count if vm_count else 0,
+            "density": vm_count / hosts_total,
+        },
+        "flavors": {
+            "first_common_flavor": {"name": "m1.small", "count": 12},
+            "second_common_flavor": {"name": "m1.medium", "count": 8},
+            "third_common_flavor": {"name": "m1.large", "count": 4},
+        },
+        "audits": audits,
+    }