add ping to containers

Dockers/remote-laravel-container/Dockerfile

@@ -9,6 +9,7 @@ RUN apt-get update && apt-get install -y \
     git \
     openssh-client \
     unzip \
+    iputils-ping \
     libpng-dev \
     libjpeg-dev \
     libfreetype6-dev \

Dockers/remote-node-container/Dockerfile

@@ -12,6 +12,7 @@ RUN apt-get update && apt-get install -y \
     git \
     openssh-client \
     openssh-server \
+    iputils-ping \
     software-properties-common \
     sudo \
     curl \

Dockers/remote-react-container/Dockerfile

@@ -7,6 +7,7 @@ WORKDIR /workspace
 RUN apt-get update && apt-get install -y \
     build-essential \
     python3 \
+    iputils-ping \
     curl \
     software-properties-common \
     git \