docs: make Asciinema demos agnostic to PaperMC version (#377)

In order to avoid giving the feeling of outdated or poorly maintained project when that's not the case.

Author: Djaytan

README.md

@@ -19,7 +19,7 @@ Available in [Docker Hub](https://hub.docker.com/r/djaytan/papermc-server).
 ## 💻 Demonstration (20 seconds)
 
 <div align="center">
-  <a href="https://asciinema.org/a/725450?autoplay=1" target="_blank"><img src="https://github.com/Djaytan/docker-papermc-server/blob/main/docs/asciinema/demo.gif" alt="asciicast"></a>
+  <a href="https://asciinema.org/a/788324?autoplay=1" target="_blank"><img src="https://github.com/Djaytan/docker-papermc-server/blob/main/docs/asciinema/demo.gif" alt="asciicast"></a>
 </div>
 
 ## 📘 Usage

docs/asciinema/README.md

@@ -9,6 +9,8 @@ Make sure the following tools are installed:
 - 📼 [asciinema CLI](https://asciinema.org/docs/installation) – used to record terminal sessions
 - 🖼️ [agg CLI](https://docs.asciinema.org/manual/agg/installation/) – used to convert recordings into GIFs
 
+⚠️ `asciinema` cannot run in Git Bash on Windows it seems (missing POSIX dependencies such as fcntl). The CLI is therefore better executed via WSL.
+
 ## 📝 Format
 
 Recordings use the [Asciicast v2 format](https://docs.asciinema.org/manual/asciicast/v2/).
@@ -23,7 +25,13 @@ This can be done by running the following commands:
 $ asciinema auth
 ```
 
-##  🧰 Generating a GIF
+Then:
+
+```bash
+$ asciinema upload demo.cast
+```
+
+## 🧰 Generating a GIF
 
 To generate a GIF from a recording, refer to the [official guide](https://docs.asciinema.org/getting-started/#generating-a-gif).
 

docs/asciinema/demo-gif.cast

@@ -85,12 +85,8 @@
 [5.000, "o", "✅ Configuration files successfully generated!\r\n"]
 [5.100, "o", "✨ PaperMC server ready to start!\r\n"]
 [10.000, "m", "Starting"]
-[10.000, "o", "Downloading mojang_1.21.4.jar\r\n"]
 [10.500, "o", "Applying patches\r\n"]
-[11.000, "o", "Starting org.bukkit.craftbukkit.Main\r\n"]
-[11.500, "o", "[14:54:34 INFO]: [bootstrap] Running Java 21 (OpenJDK 64-Bit Server VM 21.0.7+6-LTS; Eclipse Adoptium Temurin-21.0.7+6) on Linux 5.15.153.1 (amd64)\r\n"]
-[11.600, "o", "[14:54:34 INFO]: [bootstrap] Loading Paper 1.21.4-231-ver/1.21.4@09e9afd (2025-05-19T17:59:36Z) for Minecraft 1.21.4\r\n"]
-[12.000, "o", "[14:54:35 INFO]: <snip>\r\n"]
+[10.750, "o", "[14:54:35 INFO]: <snip>\r\n"]
 [12.500, "o", "[14:54:42 INFO]: Preparing level \"world\"\r\n"]
 [12.550, "o", "[14:54:45 INFO]: Preparing start region for dimension minecraft:overworld\r\n"]
 [12.600, "o", "[14:54:45 INFO]: Preparing spawn area: 2%\r\n"]

docs/asciinema/demo.cast

@@ -85,12 +85,8 @@
 [5.000, "o", "✅  Configuration files successfully generated!\r\n"]
 [5.100, "o", "✨  PaperMC server ready to start!\r\n"]
 [10.000, "m", "Starting"]
-[10.000, "o", "Downloading mojang_1.21.4.jar\r\n"]
 [10.500, "o", "Applying patches\r\n"]
-[11.000, "o", "Starting org.bukkit.craftbukkit.Main\r\n"]
-[11.500, "o", "[14:54:34 INFO]: [bootstrap] Running Java 21 (OpenJDK 64-Bit Server VM 21.0.7+6-LTS; Eclipse Adoptium Temurin-21.0.7+6) on Linux 5.15.153.1 (amd64)\r\n"]
-[11.600, "o", "[14:54:34 INFO]: [bootstrap] Loading Paper 1.21.4-231-ver/1.21.4@09e9afd (2025-05-19T17:59:36Z) for Minecraft 1.21.4\r\n"]
-[12.000, "o", "[14:54:35 INFO]: <snip>\r\n"]
+[10.750, "o", "[14:54:35 INFO]: <snip>\r\n"]
 [12.500, "o", "[14:54:42 INFO]: Preparing level \"world\"\r\n"]
 [12.550, "o", "[14:54:45 INFO]: Preparing start region for dimension minecraft:overworld\r\n"]
 [12.600, "o", "[14:54:45 INFO]: Preparing spawn area: 2%\r\n"]

docs/asciinema/demo.gif

@@ -4,7 +4,7 @@ A general-purpose, OCI-compliant PaperMC server with streamlined and fine-graine
 
 ## 💻 Demonstration (20 seconds)
 
-<script src="https://asciinema.org/a/725450.js" id="asciicast-725450" async></script>
+<script src="https://asciinema.org/a/788324.js" id="asciicast-788324" async></script>
 
 ## ✨ Highlights