Add mock data

backend/app/data/build_history.json

@@ -0,0 +1,44 @@
+{
+    "builds": [
+        {
+            "number": 205,
+            "status": "success",
+            "branch": "main",
+            "commit": "9ac3f91",
+            "author": "Miau",
+            "finished_at": "2024-05-04T10:20:00Z",
+            "duration_seconds": 312
+        },
+        {
+            "number": 204,
+            "status": "failed",
+            "branch": "feature/nosetioestoesunmock",
+            "commit": "75c4ba2",
+            "author": "Miau",
+            "finished_at": "2024-05-04T09:50:00Z",
+            "duration_seconds": 188,
+            "failed_stage": "tests",
+            "fun_message": "woops"
+        },
+        {
+            "number": 203,
+            "status": "failed",
+            "branch": "main",
+            "commit": "512ca7e",
+            "author": "Miau",
+            "finished_at": "2024-05-04T09:10:00Z",
+            "duration_seconds": 140,
+            "failed_stage": "lint",
+            "fun_message": "Nadie pasa en local el linter"
+        },
+        {
+            "number": 202,
+            "status": "success",
+            "branch": "hotfix/tehedichoqueestoesunmock?",
+            "commit": "c73d8ab",
+            "author": "Miau",
+            "finished_at": "2024-05-03T18:30:00Z",
+            "duration_seconds": 276
+        }
+    ]
+}