feat(plugins): adding default apps install with env

New configmap cm-plugin-scripts uses NEXTCLOUD_PLUGIN_LIST env
to install apps

This script is runned on each pod "start"

overlays/dev/resources/nextcloud/cm-plugins-script.yaml

@@ -0,0 +1,34 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: script-config-plugins
+data:
+  poststart-plugins.sh: |
+    #!/bin/sh
+    set -eu
+    ( 
+      if ! flock -n 7; then
+        echo "Another process is installing plugins. waiting"
+        flock 7
+        exit 0
+      fi
+
+      echo "Installing default apps"
+      plugin_list="${NEXTCLOUD_PLUGIN_LIST}"
+      OPTS=""
+      occ="/var/www/html/occ"
+
+      installed_apps=$(mktemp)
+      /bin/sh -c "${occ} app:list" | awk '!/Enabled|Disabled/ {print substr($2, 1, length($2)-1)}' > "${installed_apps}"
+
+      for plugin in ${plugin_list}; do
+        if ! grep -q "${plugin}" "${installed_apps}"; then
+          /bin/sh -c "${occ} ${OPTS} app:install ${plugin}"
+          /bin/sh -c "${occ} ${OPTS} app:update ${plugin}"
+          /bin/sh -c "${occ} ${OPTS} app:enable ${plugin}"
+        else
+          echo "${plugin} allready installed"
+        fi
+      done
+    ) 7> /var/www/html/nextcloud-plugin-install.lock
+    echo "Apps installation finished"