make antivirus-healthcheck more understandable

optional/clamav/Dockerfile

@@ -4,10 +4,11 @@ RUN apk add --no-cache clamav rsyslog wget clamav-libunrar
 
 COPY conf /etc/clamav
 COPY start.sh /start.sh
+COPY health.sh /health.sh
 
 EXPOSE 3310/tcp
 VOLUME ["/data"]
 
 CMD ["/start.sh"]
 
-HEALTHCHECK CMD [ "$(echo PING | nc localhost 3310)" = "PONG" ]
+HEALTHCHECK CMD /health.sh

optional/clamav/health.sh

@@ -0,0 +1,8 @@
+#!/bin/sh
+
+if [ "$(echo PING | nc localhost 3310)" = "PONG" ]; then
+	echo "ping successful"
+else
+	echo "ping failed"
+	exit 1
+fi