Update ampstart.sh

Add ability to run scripts on instance startup. The file must be named `customstart.sh` and be placed in the root instance directory.

Author: IceOfWraith

scripts/ampstart.sh

@@ -62,6 +62,12 @@ if [ -n "$AMP_MOUNTPOINTS" ]; then
   done
 fi
 
+if [ -f "/AMP/customstart.sh" ]; then
+  echo "[Info] Running customstart.sh..."
+  chmod +x /AMP/customstart.sh
+  /AMP/customstart.sh
+fi
+
 export AMPHOSTPLATFORM
 export AMP_CONTAINER
 export AMPMEMORYLIMIT
@@ -71,4 +77,4 @@ export AMP_CONTAINER_HOST_NETWORK
 
 ARGS=$@
 exec su -l -w AMPHOSTPLATFORM,AMP_CONTAINER,AMPMEMORYLIMIT,AMP_CONTAINER_HOST_NETWORK,AMPSWAPLIMIT,AMPCONTAINERCPUS -c "ampinstmgr --sync-certs; cd /AMP; HOME=/home/amp /AMP/AMP_Linux_$ARCH ${ARGS}; exit $?" -- amp
-exit $?
+exit $?