docs: clean up readme (#15)

* docs(readme): fix alert

* docs(readme): move alert below title

* docs(readme): expand wip

* docs(readme): add description to resource section

* docs(readme): organize dev instructions

* docs(readme): add showcase image

* docs(readme): make the last step more clear

Author: utilyre

README.md

@@ -1,33 +1,33 @@
-> [!WARN]
->
-> This repository is a WIP and subject to ongoing updates.
+![showcase](./showcase.png)
 
 # Multiplayer
 
+> [!WARNING]
+>
+> This repository is a work-in-progress and subject to ongoing updates.
+
 Multiplayer online game from scratch.
 
 ## Development
 
 1. [Install ebitengine dependencies][ebitengine_install].
 
-2. Run the server:
+2. Run the server.
 
    ```bash
    go run ./cmd/server
    ```
 
-3. In the server logs, there will be a line similar to the one below that
-   telling you what address the server is bound to:
+3. In the server logs, there will be a line similar to the one below. Copy the
+   text that is in the place of `[ADDRESS]` for the next step.
 
    ```
 	 11:10:53 INF bound udp/mcp listener address=[ADDRESS]
 	 ```
 
-	 Take note of `[ADDRESS]`.
-
-3. Run the following. Replace `<n>` with the number of clients you'd like to
-   run and also replace `[ADDRESS]` with the one you took note of in the
-   previous step.
+3. In the following command, replace `<n>` with the number of clients you would
+   like to spawn. Also, paste what you copied from the previous step, replacing
+   `[ADDRESS]`, and then execute it.
 
    ```bash
    ./spawn_clients.sh <n> -remote=[ADDRESS]
@@ -37,6 +37,8 @@ Multiplayer online game from scratch.
 
 ## Resources
 
+I have used the following materials during the development of this project.
+
 - [Networked Physics](https://gafferongames.com/categories/networked-physics)
 - [Sneaky Race Conditions and Granular Locks](https://blogtitle.github.io/sneaky-race-conditions-and-granular-locks)
 - [Network Programming with Go](https://www.amazon.com/Network-Programming-Go-Adam-Woodbeck/dp/1718500882)