Replaced backend env variables

docker-compose.yaml

@@ -36,8 +36,8 @@ services:
     image: hftstuttgart/dta-backend:latest
     user: "${UID}:${GID}"
     environment:
-      - HOST_TEST_DIR=/tmp/dta-tests
-      - CONTAINER_TEST_DIR=/tmp/dta-tests
+      - HOST_TEST_DIR=/tmp/cota-tests
+      - CONTAINER_TEST_DIR=/tmp/cota-tests
     volumes: 
       - /var/run/docker.sock:/var/run/docker.sock
       - '${HOST_TEST_DIR}:${CONTAINER_TEST_DIR}'