Add iputils-ping to the base packages (#445)

Author: hardillb

.docker/Dockerfile.debian

@@ -19,7 +19,8 @@ RUN set -ex && \
         git \
         openssl \
         openssh-client \
-        ca-certificates && \
+        ca-certificates \
+        iputils-ping && \
     mkdir -p /usr/src/node-red /data && \
     deluser --remove-home node && \
     # adduser --home /usr/src/node-red --disabled-password --no-create-home node-red --uid 1000 && \

docker-custom/Dockerfile.debian

@@ -20,7 +20,8 @@ RUN set -ex && \
         git \
         openssl \
         openssh-client \
-        ca-certificates && \
+        ca-certificates \
+        iputils-ping && \
     mkdir -p /usr/src/node-red /data && \
     deluser --remove-home node && \
     # adduser --home /usr/src/node-red --disabled-password --no-create-home node-red --uid 1000 && \