update to new standard

Author: macropin

Dockerfile

@@ -1,7 +1,9 @@
 FROM alpine:3.12
 
-RUN apk add --update bash findutils gzip postgresql-client && \
-    rm -rf /var/cache/apk/*
+RUN set -x \
+  && apk add --update bash findutils gzip postgresql-client \
+  &&  rm -rf /var/cache/apk/* \
+  ;
 
 COPY commands /commands