Using bash in Dockerfile run step

Dockerfile

@@ -1,10 +1,9 @@
 FROM debian:stable-slim
 RUN apt-get update && apt-get install -y \
-        bash \
         curl \
         file \
         unzip \
         zip \
     && rm -rf /var/lib/apt/lists/*
-RUN ["/bin/bash", "-c", "$(curl -fsSL https://git.phoenix.ipv64.de/public/warp4j/raw/branch/feature/update_install_script/install)"]
+RUN ["/usr/bin/bash", "-c", "$(curl -fsSL https://git.phoenix.ipv64.de/public/warp4j/raw/branch/feature/update_install_script/install)"]
 ENTRYPOINT [ "/usr/local/bin/warp4j" ]

install

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # install location
 LOCATION=/usr/local/bin