minecraft: add page

pages/common/minecraft.md

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+# minecraft
+
+> Run a headless Minecraft server.
+> More information: <https://minecraft.wiki/w/Tutorial:Setting_up_a_Java_Edition_server>.
+
+- Start a Minecraft server and generate a world if it doesn't exist:
+
+`java -jar {{path/to/server.jar}} --nogui`
+
+- Set the minimum and maximum amount of memory a server is allowed to have (Note: Setting them the same prevents lag caused by heap scaling):
+
+`java -Xms{{1024M}} -Xmx{{2048M}} -jar {{path/to/server.jar}} --nogui`
+
+- Start a server with a GUI:
+
+`java -jar {{path/to/server.jar}}`
+
+- Shut the server down:
+
+`stop`