Update README.md

Author: mmontes11

README.md

@@ -10,6 +10,38 @@
 </p>
 
 # 🍼 init
-Init container for MariaDB that co-operates with [mariadb-operator](https://github.com/mariadb-operator/mariadb-operator).
+Init container for MariaDB that co-operates with [mariadb-operator](https://github.com/mariadb-operator/mariadb-operator). Configure Galera and guarantee ordered deployments for MariaDB.
+- Avoid hacking with bash `initContainers`, do it properly in Go
+- Get `MariaDB` resources from the Kubernetes API and configure Galera based on them
+- Guarantee MariaDB ordered deployment by checking its `Pod` Ready conditions in the Kubernetes API
+- Allow `spec.podManagementPolicy` = `Parallel` in the MariaDB `StatefulSet`
 
-🚧🚧🚧
+### How to use it
+
+Specify the init image in the `MariaDB` `spec.galera.initContainer` field.
+
+```yaml
+apiVersion: mariadb.mmontes.io/v1alpha1
+kind: MariaDB
+metadata:
+  name: mariadb-galera
+spec:
+  ...
+  image:
+    repository: mariadb
+    tag: "10.11.3"
+    pullPolicy: IfNotPresent
+  port: 3306
+  replicas: 3
+
+  galera:
+    sst: mariabackup
+    replicaThreads: 1
+
+    initContainer:
+      image:
+        repository: ghcr.io/mariadb-operator/init
+        tag: "v0.0.1"
+        pullPolicy: IfNotPresent
+  ...
+```

main.go

@@ -69,7 +69,7 @@ func main() {
 	if err != nil {
 		log.Fatalf("Error creating logger: %v", err)
 	}
-	logger.Info("Staring init")
+	logger.Info("Statring init")
 
 	env, err := env()
 	if err != nil {