[+] Write mysql migration guide

docs/mysql_to_mariadb.md

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+## Migrating MySQL to MariaDB
+
+Since AquaDX 1.0.0, MySQL will no longer be supported.
+
+If you were using Aqua / AquaDX <= 0.0.47 with a MySQL database before this upgrade, please follow the instructions below to migrate your data to MariaDB.
+
+### 1. Run a MariaDB Server
+
+To migrate, you first need to run a MariaDB server using your preferred method.
+If you don't have a preference, we recommend running it using Docker Compose.
+
+Below is an example `docker-compose.yml` configuration to run a MariaDB server.
+
+```yaml
+version: '3.1'
+
+services:
+  mariadb:
+    image: mariadb
+    restart: always
+    environment:
+      MYSQL_ROOT_PASSWORD: example
+      MYSQL_DATABASE: aqua
+      MYSQL_USER: aqua
+      MYSQL_PASSWORD: aqua
+    ports:
+      - '127.0.0.1:3306:3306'
+    volumes:
+      - ./db:/var/lib/mysql
+```
+
+### 2. Export Data from MySQL
+
+Run the following command to export your data from MySQL. Please fill in the fields in the curly braces with your MySQL database details.
+
+```bash
+mysqldump --user={username} --password={password} --host={host} --port={port} {database} > aqua.sql
+```
+
+### 3. Import Data to MariaDB
+
+Run the following command to import your data to MariaDB. Please fill in the fields in the curly braces with your MariaDB database details.
+
+```bash
+mysql --user={username} --password={password} --host={host} --port={port} {database} < aqua.sql
+```
+
+### 4. Fix Flyway Schema History
+
+AquaDX uses Flyway to manage database schema migrations. Most migrations were identical, but one migration used different case for MySQL and MariaDB, so we need to fix its checksum.
+
+```shell
+# Connect to your MariaDB server
+mysql --user={username} --password={password} --host={host} --port={port} {database}
+```
+
+Run the following SQL query to fix the checksum.
+
+```sql
+UPDATE main.flyway_schema_history t
+SET t.checksum = 357127209
+WHERE t.installed_rank = 144;
+```
+
+### 5. Update AquaDX Configuration
+
+Finally, update your AquaDX configuration `application.properties` to use MariaDB instead of MySQL.
+
+
+
+