fix: increase etcd max storage to 5GiB

Adds QuotaBackendBytes flag and sets it to 5GiB.
Ref.: https://etcd.io/docs/v3.3/dev-guide/limit/

Signed-off-by: Juliana Oliveira <juliana@fly.io>

Author: jwnx

internal/flyetcd/config.go

@@ -36,9 +36,10 @@ type Config struct {
 	AutoCompactionRetention  string `yaml:"auto-compaction-retention"`
 	AuthToken                string `yaml:"auth-token"`
 
-	MaxSnapshots  int `yaml:"max-snapshots"`
-	MaxWals       int `yaml:"max-wals"`
-	SnapshotCount int `yaml:"snapshot-count"`
+	MaxSnapshots      int `yaml:"max-snapshots"`
+	MaxWals           int `yaml:"max-wals"`
+	SnapshotCount     int `yaml:"snapshot-count"`
+	QuotaBackendBytes int `yaml:"quota-backend-bytes"`
 }
 
 func NewConfig() (*Config, error) {
@@ -65,7 +66,8 @@ func NewConfig() (*Config, error) {
 		AuthToken:               "",
 		MaxSnapshots:            10,
 		MaxWals:                 10,
-		SnapshotCount:           10000, // Default
+		SnapshotCount:           10000,      // Default
+		QuotaBackendBytes:       5368709120, // 5GiB
 	}
 
 	if err := cfg.SetAuthToken(); err != nil {