Node Uptime (#196)

* fix: node stats updating live
* fix: Propagation time for first node to hit a block
* chore: Leaner feed serialization
* fix: Handle old nodes with stringified network_state
* feat: Add Node Uptime to the list
* chore: Remove old backend from test pipeline

package.json

@@ -13,9 +13,6 @@
     "build:all": "scripts/build-all.sh",
     "start:frontend": "scripts/start-frontend.sh",
     "build:frontend": "scripts/build-frontend.sh",
-    "start:backend": "scripts/start-backend.sh",
-    "build:backend": "scripts/build-backend.sh",
-    "check:backend": "tsc -p packages/backend --noEmit",
     "build:common": "tsc -p packages/common",
     "check:common": "tsc -p packages/common --noEmit",
     "test": "scripts/test.sh"