added shell script to update all containers

update-containers.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+# go to "docker/media" folder
+cd ~/docker/media
+
+# stop docker
+echo "Stopping docker"
+docker compose down
+
+ERROR_FILE="/tmp/docker-images-update.error"
+
+# make sure that docker is running
+DOCKER_INFO_OUTPUT=$(docker info 2> /dev/null | grep "Containers:" | awk '{print $1}')
+
+if [ "$DOCKER_INFO_OUTPUT" == "Containers:" ]
+  then
+    echo "Docker is running, so we can continue"
+  else
+    echo "Docker is not running, exiting"
+    exit 1
+fi
+
+# get a list of docker images that are currently installed
+IMAGES_WITH_TAGS=$(docker images | grep -v REPOSITORY | grep -v TAG | grep -v "<none>" | awk '{printf("%s:%s\n", $1, $2)}')
+
+# run docker pull on all of the images
+for IMAGE in $IMAGES_WITH_TAGS; do
+  echo "*****"
+  echo "Updating $IMAGE"
+  docker pull $IMAGE 2> $ERROR_FILE
+  if [ $? != 0 ]; then
+    ERROR=$(cat $ERROR_FILE | grep "not found")
+    if [ "$ERROR" != "" ]; then
+      echo "WARNING: Docker image $IMAGE not found in repository, skipping"
+    else
+      echo "ERROR: docker pull failed on image - $IMAGE"
+      exit 2
+    fi
+  fi
+  echo "*****"
+  echo
+done
+
+# restart docker
+echo "Restarting Docker"
+docker compose up -d
+
+# did everything finish correctly? Then we can exit
+echo "Docker images are now up to date"
+exit 0