[Watchdog] Update to new image with smtp-cli 3.9

data/Dockerfiles/watchdog/Dockerfile

@@ -3,28 +3,28 @@ LABEL maintainer "André Peters <andre.peters@servercow.de>"
 
 # Installation
 RUN apk add --update \
-	&& apk add --no-cache nagios-plugins-smtp \
-	nagios-plugins-tcp \
-	nagios-plugins-http \
-	nagios-plugins-ping \
-	curl \
-	bash \
-	jq \
-	fcgi \
-	nagios-plugins-mysql \
-	nagios-plugins-dns \
-    nagios-plugins-disk \
-	bind-tools \
-	redis \
-	perl \
-	perl-io-socket-ssl \
-	perl-socket \
-	perl-socket6 \
-	perl-mime-lite \
-	perl-term-readkey \
+  && apk add --no-cache nagios-plugins-smtp \
+  nagios-plugins-tcp \
+  nagios-plugins-http \
+  nagios-plugins-ping \
+  curl \
+  bash \
+  jq \
+  fcgi \
+  nagios-plugins-mysql \
+  nagios-plugins-dns \
+  nagios-plugins-disk \
+  bind-tools \
+  redis \
+  perl \
+  perl-io-socket-ssl \
+  perl-socket \
+  perl-socket6 \
+  perl-mime-lite \
+  perl-term-readkey \
   tini \
-	&& curl https://raw.githubusercontent.com/mludvig/smtp-cli/v3.9/smtp-cli -o /smtp-cli \
-	&& chmod +x smtp-cli
+  && curl https://raw.githubusercontent.com/mludvig/smtp-cli/v3.9/smtp-cli -o /smtp-cli \
+  && chmod +x smtp-cli
 
 COPY watchdog.sh /watchdog.sh