No use starting cron during build, start on launch instead.

Dockerfile

@@ -61,8 +61,7 @@ RUN apt-get remove -y g++ python3-dev libpq-dev && apt-get autoremove -y && \
 
 # Setup cron
 COPY --chmod=0644 nginx/crontab ./nginx/crontab
-RUN ln -s ./nginx/crontab /var/spool/cron/crontabs/root && \
-    service cron enable
+RUN ln -s ./nginx/crontab /var/spool/cron/crontabs/root
 
 # Install project Node dependencies
 COPY package.json ./

docker-compose.yml

@@ -17,7 +17,7 @@ services:
   webapp:
     image: opendronemap/webodm_webapp
     container_name: webapp
-    entrypoint: /bin/bash -c "chmod +x /webodm/*.sh && /bin/bash -c \"/webodm/wait-for-postgres.sh db /webodm/wait-for-it.sh -t 0 broker:6379 -- /webodm/start.sh\""
+    entrypoint: /bin/bash -c "service cron start && chmod +x /webodm/*.sh && /bin/bash -c \"/webodm/wait-for-postgres.sh db /webodm/wait-for-it.sh -t 0 broker:6379 -- /webodm/start.sh\""
     volumes:
       - ${WO_MEDIA_DIR}:/webodm/app/media:z
     ports: