Fix start/upgrade scripts to properly restart the backend processes

backend/package.json

@@ -22,7 +22,7 @@
   "scripts": {
     "build": "tsc",
     "start": "npm run build && node dist/index.js",
-    "production": "until false;do npm install;npm run build;node dist/index.js;sleep 1;done",
+    "production": "npm install && npm run build && node dist/index.js",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "dependencies": {

production/mempool-start-all

@@ -2,7 +2,7 @@
 for site in mainnet liquid testnet
 do
     cd "${HOME}/${site}/backend/"
-    screen -dmS "${site}" npm run production
+    screen -dmS "${site}" sh -c 'while true;do npm run production;sleep 1;done'
 done
 
 #cd "${HOME}/webhook/"