- Add doc.md to know how to use the provider

Signed-off-by: Alejandro JNM <alejandrojnm@gmail.com>

doc.md

@@ -0,0 +1,46 @@
+# Help to use the civo terraform provider
+
+## Leyend
+
+- ``#`` (optional parameter)
+
+### Define provider
+
+```
+provider "civo" {
+  token = "token"
+}
+```
+
+### Create a Network
+
+```bash
+resource "civo_network" "custom_net" {
+    label = "test_network"
+}
+```
+
+### Create a Instances
+
+```bash
+resource "civo_instance" "my-test-instance" {
+    hostname = "test-terraform"
+    initial_user = "root"
+    size = "g2.large"
+    # template = "id"
+    # network_id = civo_network.custom_net.id // this will be calculate automatic
+    # depends_on = [civo_network.custom_net]  // this is to wait for the creation of the network  
+}
+```
+
+### Create a Volume
+
+```bash
+resource "civo_volume" "custom_volume" {
+    name = "backup-data"
+    size_gb = 60
+    bootable = false
+    # instance_id = civo_instance.my-test-instance.id // this will be calculate automatic
+    # depends_on = [civo_instance.my-test-instance] // this is to wait for the creation of the instances  
+}
+```