Update routine changed

docs/install-update.md

@@ -1,56 +1,21 @@
 There is no update routine. You need to refresh your pulled repository clone and apply your local changes (if any). Actually there are many ways to merge local changes.
 
-### Step 1, method 1
-Stash all local changes, pull changes from the remote master branch and apply your stash on top of it. You will most likely see warnings about non-commited changes; you can ignore them:
-
-```
-# Stash local changes
-git stash
-# Re-pull master
-git pull
-# Apply stash and remove it
-git stash pop
-```
-
-### Step 1, method 2
+### Step 1
 Fetch new data from GitHub, commit changes and merge remote repository:
 
 ```
-# Get updates/changes
-git fetch
-# Add all changed files to local clone
+# 1. Get updates/changes
+git fetch origin master
+# 2. Add all changed files to local clone
 git add -A
-# Commit changes, ignore git complaining about username and mail address
+# 3. Commit changes, ignore git complaining about username and mail address
 git commit -m "Local config at $(date)"
-# Merge changes
-git merge
-```
+# 4. Merge changes, prefere mailcow repository
+git merge -Xtheirs -Xpatience
 
-If git complains about conflicts, solve them! Example:
-```
-CONFLICT (content): Merge conflict in data/web/index.php
-```
-
-Open `data/web/index.php`, solve the conflict, close the file and run `git add -A` + `git commit -m "Solved conflict"`.
-
-### Step 1, method 3
-
-Thanks to fabreg @ GitHub!
-
-In case both methods do not work (for many reason like you're unable to fix the CONFLICTS or any other reasons) you can simply start all over again.
-
-Keep in mind that all local changes _to configuration files_ will be lost. However, your volumes will not be removed.
-
-- Copy mailcow.conf somewhere outside the mailcow-dockerized directory
-- Stop and remove mailcow containers: `docker-compose down`
-- Delete the directory or rename it
-- Clone the remote repository again (`git clone https://github.com/mailcow/mailcow-dockerized && cd mailcow-dockerized`). **Pay attention** to this step - the folder must have the same name of the previous one!
-- Copy back your previous `mailcow.conf` into the mailcow-dockerized folder
-
-If you forgot to stop Docker before deleting the cloned directory, you can use the following commands:
-```
-docker stop $(docker ps -a -q)
-docker rm $(docker ps -a -q)
+# If it conflicts with files that were deleted from the mailcow repository, just run...
+git status --porcelain | grep -E "UD|DU" | awk '{print $2}' | xargs rm -v
+# ...and repeat step 2 and 3
 ```
 
 ### Step 2