Update dump-init version

Author: Jakob Helmecke

Dockerfile

@@ -1,13 +1,16 @@
 FROM debian:stretch-slim
 
-ENV DUMB_INIT_VERSION 1.2.1
+ENV DUMB_INIT_VERSION 1.2.2
 
 COPY bin/ /usr/local/bin/
 
 RUN set -x && \
-    clean-install procps curl ca-certificates && \
+    clean-install \
+        ca-certificates \
+        curl \
+        procps && \
     curl -sL https://github.com/Yelp/dumb-init/releases/download/v${DUMB_INIT_VERSION}/dumb-init_${DUMB_INIT_VERSION}_amd64 -o /usr/local/bin/dumb-init && \
     chmod +x /usr/local/bin/dumb-init && \
-    clean-uninstall curl ca-certificates
+    clean-uninstall curl
 
 ENTRYPOINT ["/usr/local/bin/dumb-init"]