fix: Add reconnection to known peers (#1482)

## Relevant issue(s)

Resolves #1481 

## Description

Currently, we de not reconnect to known peers on restart unless the peer
is defined in the config file or on the CLI command. This PR makes sure
that we try to reconnect to known peers.

net/peer.go

@@ -137,6 +137,25 @@ func (p *Peer) Start() error {
 	p.mu.Lock()
 	defer p.mu.Unlock()
 
+	// reconnect to known peers
+	for _, id := range p.host.Peerstore().PeersWithAddrs() {
+		if id == p.host.ID() {
+			continue
+		}
+		go func(id peer.ID) {
+			addr := p.host.Peerstore().PeerInfo(id)
+			err := p.host.Connect(p.ctx, addr)
+			if err != nil {
+				log.Info(
+					p.ctx,
+					"Failure while reconnecting to a known peer",
+					logging.NewKV("peer", id),
+					logging.NewKV("error", err),
+				)
+			}
+		}(id)
+	}
+
 	p2plistener, err := gostream.Listen(p.host, corenet.Protocol)
 	if err != nil {
 		return err