Fix Prometheus duplicate error

.gitignore

@@ -4,5 +4,6 @@ ipld-ethcl-indexer.log
 report.json
 cover.profile
 temp/*
+.vscode/*
 pkg/beaconclient/ssz-data/
 *.test

example.ipld-ethcl-indexer-config.json

@@ -8,7 +8,7 @@
     "driver": "PGX"
   },
   "bc": {
-    "address": "10.203.8.51",
+    "address": "localhost",
     "port": 5052,
     "type": "lighthouse",
     "bootRetryInterval": 30,
@@ -17,7 +17,7 @@
     "connectionProtocol": "http"
   },
   "t": {
-    "skipSync": false
+    "skipSync": true
   },
   "log": {
     "level": "debug",

pkg/beaconclient/metrics.go

@@ -46,8 +46,11 @@ func CreateBeaconClientMetrics() *BeaconClientMetrics {
 func prometheusRegisterHelper(name string, help string, varPointer *uint64) {
 	prometheus.MustRegister(prometheus.NewCounterFunc(
 		prometheus.CounterOpts{
+			Namespace:   "beacon_client",
+			Subsystem:   "",
 			Name:        name,
 			Help:        help,
+			ConstLabels: map[string]string{},
 		},
 		func() float64 {
 			return float64(atomic.LoadUint64(varPointer))