fix: shell wrapper to handle signals

piped.sh

@@ -0,0 +1,14 @@
+#!/bin/sh
+
+java -server -Xmx${MAX_MEMORY:-1G} -Xaggressive \
+  -XX:+UnlockExperimentalVMOptions -XX:+OptimizeStringConcat -XX:+UseStringDeduplication \
+  -XX:+UseCompressedOops -XX:+UseNUMA -XX:+IdleTuningGcOnIdle -Xgcpolicy:gencon \
+  -Xshareclasses:allowClasspaths -Xtune:virtualized -Xcompactgc \
+  -jar /app/piped.jar &
+
+pid=$!
+
+trap "kill -INT $pid" INT
+trap "kill -TERM $pid" TERM
+
+wait