Added draft for update-docker

roles/update-docker/README.md

@@ -0,0 +1,4 @@
+# update-docker
+script to update docker-compose instances
+## See
+- [ChatGPT: Docker --force-recreate vs. --build](https://chat.openai.com/share/4cbf76a0-878b-4ce4-ba43-08a7b6dfcd0b)

roles/update-docker/files/update-docker-compose-instances.sh

@@ -0,0 +1,43 @@
+#!/bin/bash
+
+# Check if a path argument was provided
+if [ -z "$1" ]; then
+  echo "Please provide the path to the parent directory as a parameter."
+  exit 1
+fi
+
+# Iterate over all directories in the parent directory
+for dir in "$1"/*; do
+  # Check if it is indeed a directory
+  if [ -d "$dir" ]; then
+    echo "Checking for updates in: $dir"
+    cd "$dir"
+    
+    # Check if directory is a Git repository
+    if [ -d ".git" ]; then
+      echo "Checking if the git repository is up to date."
+      git fetch
+      LOCAL=$(git rev-parse @)
+      REMOTE=$(git rev-parse @{u})
+      
+      # If local commit differs from remote, pull the changes
+      if [ "$LOCAL" != "$REMOTE" ]; then
+        echo "Repository is not up to date. Performing git pull."
+        git pull || exit 3
+      else
+        echo "Repository is already up to date."
+      fi
+    fi
+
+    # Pull the latest images and rebuild the containers
+    echo "Pulling docker images and rebuilding containers."
+    docker-compose pull && docker-compose up -d --build --force-recreate || exit 1
+    
+    # Additional command for the 'nextcloud' directory
+    if [ "$(basename "$dir")" == "nextcloud" ]; then
+      echo "Updating Nextcloud apps."
+      docker-compose exec -T -u www-data application /var/www/html/occ app:update --all || exit 2
+    fi
+    cd - > /dev/null
+  fi
+done