Fix Quadlet container detection

- Remove compose-only filtering from check_image() function
- Restore v0.6.0 behavior of checking ALL containers
- Filtering now happens only during update phase, not check phase
- Fixes issue where Quadlet containers were skipped with 'no compose file'

README.md

@@ -34,6 +34,7 @@ ___
     - Added snooze functionality to prevent duplicate notifications
     - Improved dependency management with automatic downloads
     - Added helper functions: `releasenotes()`, `list_options()`, `progress_bar()`
+    - **Fixed Quadlet container detection**: Restored v0.6.0 behavior of checking ALL containers for updates, including systemd-managed Quadlet containers
 - **v0.6.0**:
     - **Grafana & Prometheus Integration:**  
       - Added a detailed Prometheus metrics exporter that now reports not only the number of containers with updates, no-updates, and errors, but also the total number of containers checked, the duration of the update check, and the epoch timestamp of the last check.
@@ -125,11 +126,25 @@ Then call the script anywhere with just `podcheck.sh`.
 Add preferred `notify.sh`-template to the same directory - this will not be touched by the scripts self-update function.
 
 ## Configuration
-To modify settings and have them persist through updates - copy the `default.config` to `podcheck.config` alongside the script or in `~/.config/`. 
+
+**For advanced features like notifications and custom settings**, you'll need to create a configuration file:
+
+1. **Copy the default configuration**: `cp default.config podcheck.config`
+2. **Place it alongside the script** or in `~/.config/`
+3. **Uncomment and modify** the settings you want to customize
+
+The `podcheck.config` file must be present and properly configured for:
+
+- Notification channels (`NOTIFY_CHANNELS`)
+- Custom timeout, async, and update behaviors  
+- Notification templates and credentials
+
+Without this config file, podcheck will run with default settings and notifications will be disabled.
 
 Alternatively create an alias where specific flags and values are set.  
 Example `alias pc=podcheck.sh -p -x 10 -t 3`.
 
+
 ## Notifications
 Triggered with the `-i` flag. Will send a list of containers with updates available and a notification when `podcheck.sh` itself has an update.
 `notify_templates/notify_v2.sh` is the default notification wrapper, if `notify.sh` is present and configured, it will override.

podcheck.sh

@@ -537,14 +537,8 @@ check_image() {
     fi
   done
 
-  # Skipping non-compose containers unless option is set
-  ContLabels=$(podman inspect "$i" --format '{{json .Config.Labels}}')
-  ContPath=$($jqbin -r '."com.docker.compose.project.working_dir"' <<< "$ContLabels")
-  [[ "$ContPath" == "null" ]] && ContPath=""
-  if [[ -z "$ContPath" ]] && [[ "$DRunUp" == false ]]; then
-    printf "%s\n" "NoUpdates !$i - not checked, no compose file"
-    return
-  fi
+  # Check ALL containers - original v0.6.0 behavior
+  # Filtering happens during update, not during check
 
   local NoUpdates GotUpdates GotErrors
   ImageId=$(podman inspect "$i" --format='{{.Image}}')