added changes to improve performance of sync

docker-compose.yml

@@ -8,6 +8,8 @@ services:
       MYSQL_PASSWORD: camerapassword # ${{secrets.MYSQL_PASSWORD}}
     ports:
       - "3306:3306"
+    volumes:
+        - ./mariadb:/var/lib/mysql:Z
     healthcheck:
       test: ["CMD", "mariadb-admin", "ping", "-h", "localhost", "-uroot", "-prootpassword"]
       interval: 10s
@@ -17,6 +19,7 @@ services:
 
   web:
     image: git.hamburg.ccc.de/ccchh/sunders/web:latest
+    build: ./web/
     environment:
       MYSQL_HOST: db
       MYSQL_DB: camera # ${{secrets.MYSQL_DATABASE}}
@@ -34,6 +37,7 @@ services:
   
   data_handler:
     image: git.hamburg.ccc.de/ccchh/sunders/data_handler:latest
+    build: ./data_handler/
     environment:
       MYSQL_HOST: db
       MYSQL_DB: camera # ${{secrets.MYSQL_DATABASE}}