create fifo for server console access

Jenkinsfile

@@ -35,7 +35,7 @@ spec:
                     script {
                         try {
                             docker.withRegistry('http://dockermirror:5000') {
-                                docker.image("ubuntu:focal").pull()
+                                docker.image("ubuntu:jammy").pull()
                                 docker.image(image_name).pull() // Pull a recent version to share base layers with (?)
                             }
                         } catch (exc) {

README.md

@@ -19,3 +19,4 @@ Mount `/srv/spigot/` to the host. This dir should be owned by UID 1000:
 ## Protips
 
 * Memory limit: `-e MEMLIMIT=512m`. Defaults to 1024m.
+* Send commands to the server console: `$ echo "kick xMopx" > /srv/spigot/stdin`

start

@@ -8,4 +8,7 @@ test ! -f /srv/spigot/eula.txt && cp /srv/spigot-default/eula.txt /srv/spigot/
 
 cd /srv/spigot/
 
-exec java -Xmx$MEMLIMIT $JAVAARGS -jar spigot.jar --nojline $@
+rm -f stdin
+mkfifo stdin
+
+exec java -Xmx$MEMLIMIT $JAVAARGS -jar spigot.jar --nojline $@ <> ./stdin