Update Minecraft server instance configuration docs

Enhanced the Minecraft documentation to illustrate the use of more descriptive instance names (`mcserver1`, `mcserver2`) for clarity. Domain references were updated to align with these changes and demonstrate the correct italics markdown format. Additionally, provided instructions for setting different Docker image tags per instance, allowing for varying Minecraft server versions on a per-server basis, which facilitates more flexible server management and version control.

docs/sandbox/apps/minecraft.md

@@ -35,17 +35,17 @@ This will install [mc-router](../apps/mcrouter.md) and the minecraft server. If
 
 To add multiple instances, add the following to the inventory. See these instructions on inventory [here](../../saltbox/inventory/index.md).
 
-```yaml
+``` yaml
 
-minecraft_instances: ["server1", "server2"] # (1)!
+minecraft_instances: ["mcserver1", "mcserver2"] # (1)!
 
 ```
 
 1. This will install two servers, server1 and server2.
 
-These servers will be accesible at `instanceName.__yourdomain.com__`
+These servers will be accesible at `instanceName._yourdomain.com_`
 
-So for the example above, `server1.youdomain.com` and `server2.yourdomain.com`
+So for the example above, `mcserver1._yourdomain.com_` and `mcserver2._yourdomain.com_`
 
 ### 4. Setup
 
@@ -55,4 +55,16 @@ For a single install, the inventory paths will look like this `minecraft_docker_
 
 When you have set up multiple servers, they will all use the `minecraft_docker_image_tag` settings as a default. To override this use the instance name instead. E.g `instanceName_docker_image_tag`
 
+``` yaml title="Inventory"
+
+minecraft_instances: ["server1", "server2"] # (1)!
+mcserver1_docker_image_tag: "itzg/minecraft-server:latest" # (2)!
+mcserver2_docker_image_tag: "itzg/minecraft-server:1.17.1" # (3)!
+
+```
+
+1. This will install two servers, mcserver1 and mcserver2.
+2. This will install the latest version of the minecraft server on mcserver1.
+3. This will install version 1.17.1 of the minecraft server on mcserver2.
+
 - [:octicons-link-16: Documentation](https://github.com/itzg/docker-minecraft-server){: .header-icons }