Merge pull request #5 from cron-eu/healthcheck

Add healthcheck to web container

Dockerfile

@@ -2,7 +2,7 @@
 FROM httpd:2.4
 
 # We will need openssl tool for the entrypoint
-RUN apt-get -qq update && apt-get -q install -y openssl && rm -rf /var/lib/apt/lists/*
+RUN apt-get -qq update && apt-get -q install -y openssl netcat && rm -rf /var/lib/apt/lists/*
 
 # Prepare our apache configuration
 RUN rm /usr/local/apache2/conf/extra/httpd-vhosts.conf /usr/local/apache2/conf/original/extra/httpd-ssl.conf
@@ -16,6 +16,9 @@ RUN chmod 644 /usr/local/apache2/conf/httpd.conf /usr/local/apache2/conf/extra/h
 COPY files/entrypoint.sh /
 RUN chmod 755 /entrypoint.sh
 
+# Configure healthcheck - use "nc" to see if port 80 is open, because curl might still get errors (403, etc)
+HEALTHCHECK --interval=5s --timeout=3s CMD nc -z -v localhost 80 || exit 1
+
 # Also expose SSL port
 EXPOSE 80 443