fix(quickstart): set utf8mb4 for mysql (#1657)

Co-authored-by: Ilya Makarov <[email protected]>

docker/quickstart/docker-compose.yml

@@ -6,6 +6,7 @@ services:
     hostname: mysql
     image: mysql:5.7
     restart: always
+    command: --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci
     environment:
       MYSQL_DATABASE: 'datahub'
       MYSQL_USER: 'datahub'
@@ -184,7 +185,7 @@ services:
       - EBEAN_DATASOURCE_USERNAME=datahub
       - EBEAN_DATASOURCE_PASSWORD=datahub
       - EBEAN_DATASOURCE_HOST=mysql:3306
-      - EBEAN_DATASOURCE_URL=jdbc:mysql://mysql:3306/datahub?verifyServerCertificate=false&useSSL=true
+      - EBEAN_DATASOURCE_URL=jdbc:mysql://mysql:3306/datahub?verifyServerCertificate=false&useSSL=true&useUnicode=yes&characterEncoding=UTF-8
       - EBEAN_DATASOURCE_DRIVER=com.mysql.jdbc.Driver
       - KAFKA_BOOTSTRAP_SERVER=broker:29092
       - KAFKA_SCHEMAREGISTRY_URL=http://schema-registry:8081