Fix: Add new configs to all config instances properly.

backend/src/__fixtures__/mempool-config.template.json

@@ -31,8 +31,8 @@
     "CPFP_INDEXING": true,
     "MAX_BLOCKS_BULK_QUERY": 999,
     "DISK_CACHE_BLOCK_INTERVAL": 999,
-    "MAX_PUSH_TX_SIZE_WEIGHT": "__MEMPOOL_MAX_PUSH_TX_SIZE_WEIGHT__",
-    "ALLOW_UNREACHABLE": "__MEMPOOL_ALLOW_UNREACHABLE__"
+    "MAX_PUSH_TX_SIZE_WEIGHT": 4000000,
+    "ALLOW_UNREACHABLE": true
   },
   "CORE_RPC": {
     "HOST": "__CORE_RPC_HOST__",