Add info about latest image and minor fixes

Author: hugotiburtino

README.md

@@ -9,13 +9,19 @@ This repository contains a custom `mysql` docker image. Changes we have made:
 
 ## Change DB via migrations
 
-In order to change the DB image via DB migrations in https://github.com/serlo/db-migrations do the following:
+In order to change the DB image via DB migrations do the following:
 
 1. Run MySQL DB in this repository with `make up`.
-2. Run DB migrations in `db-migrations`, e.g. via `yarn migrate:run`.
+2. Run DB migrations
 3. Check the changes in the DB via `make mysql`.
 4. Make a new dump via `make dump` and commit your changes.
 
+## Publish Image
+
+In order to automatically create the latest image, change the version at file `VERSION` and merge into `main` will.
+
 ## Publish prereleases
 
-In order to publish a prerelease push to a branch with a name starting with `prerelease`. Then an image with a tag similar to the branch name is published. When you for example an image to a branch named `prerelease-feature1` an image is created which you can access via `eu.gcr.io/serlo-shared/serlo-mysql-database:prerelease-feature1`. This is for example useful when you need DB migrations in order to develop a new feature.
+In order to publish a prerelease push to a branch with a name starting with `prerelease`. Then an image with a tag similar to the branch name is published. For example: a remote branch name like `prerelease-feature1` will created an image which you can access via `ghcr.io/serlo/serlo-mysql-database:prerelease-feature1`. This is for example useful when you need DB migrations in order to develop a new feature.
+
+