use an entrypoint script that starts a cronjob to run every minute

entrypoint.sh

@@ -0,0 +1,12 @@
+#!/bin/sh
+set +x
+
+# Create a cron job that runs every minute
+echo "* * * * * /app/run_tests.sh" > /etc/crontabs/root
+
+# Start cron
+crond -f &
+
+# Start Nginx
+exec nginx -g 'daemon off;'
+

run_tests.sh

@@ -1,3 +1,3 @@
 #!/bin/sh
 
-printf ":-)\n\nTests started on $(date)" > results/smile.txt
+printf ":-)\n\nTests started on $(date)" > /app/results/smile.txt

webapp.Dockerfile

@@ -1,9 +1,9 @@
 # Use main image as base
 FROM ghcr.io/marmotitude/object-storage-tests:main
 
-# Install Nginx
+# Install Nginx and cron
 RUN apk update && \
-    apk add nginx
+    apk add --no-cache nginx dcron
 
 # Keep a backup of alpine's default nginx config
 RUN mv /etc/nginx/nginx.conf /etc/nginx/nginx.conf.orig
@@ -22,7 +22,7 @@ RUN chown -R root:root results && \
     chmod -R 755 results
 
 # Write dummy file to results directory with a smile and timestamp
-RUN printf ":-)\n\nBuilded on $(date) by:$(hostname)" > results/smile.txt
+RUN printf ":-)\n\nBuilt on $(date) by:$(hostname)" > results/smile.txt
 
 # Copy the shell script that runs desired tests outputing to results folder
 # this script will be executed by an external scheduler periodically
@@ -31,6 +31,11 @@ COPY run_tests.sh /app/run_tests.sh
 # Expose port 5000
 EXPOSE 5000
 
-# Override the main image's entry point and set the default command
-ENTRYPOINT ["nginx", "-g", "daemon off;"]
-CMD []
+# Copy the entrypoint script
+COPY entrypoint.sh /app/entrypoint.sh
+
+# Make the script executable
+RUN chmod +x /app/entrypoint.sh
+
+# Set the ENTRYPOINT to the script
+ENTRYPOINT ["/app/entrypoint.sh"]