Hardening of the Frontend docker image (#377)

* move the env-config script to a sub folder
* fix doc
* fix ports and ref to the official image
* add hardening to the docker-compose examples

scripts/build-docker-frontend.sh

@@ -1,11 +1,28 @@
 #!/usr/bin/env bash
+set -e
 
-cd `git rev-parse --show-toplevel`
+pushd "$(git rev-parse --show-toplevel)/frontend" > /dev/null
 
-IMAGE=telemetry-frontend
-DOCKER_USER=${DOCKER_USER:-paritytech} 
+while getopts ":Nsgapv:" arg; do
+  case "${arg}" in
+    p)
+      PUBLISH="true"
+      ;;
+  esac
+done
+
+IMAGE=substrate-telemetry-frontend
+DOCKER_USER=${DOCKER_USER:-paritytech}
 echo "Publishing $IMAGE as $DOCKER_USER"
 
-docker build -t $IMAGE -f packages/frontend/Dockerfile .
-docker tag $IMAGE $DOCKER_USER/$IMAGE
-docker push $DOCKER_USER/$IMAGE
+docker build -t $DOCKER_USER/$IMAGE -f ./Dockerfile .
+
+if [[ "$PUBLISH" = 'true' ]]; then
+    docker push $DOCKER_USER/$IMAGE
+else
+    echo 'No -p passed, skipping publishing to docker hub'
+fi
+
+popd > /dev/null
+
+docker images | grep $IMAGE