Using su instead of sudo, fixing Dokcerfile

Dockerfile

@@ -5,5 +5,5 @@ RUN apt-get update && apt-get install -y \
         unzip \
         zip \
     && rm -rf /var/lib/apt/lists/*
-RUN ["/bin/sh", "-c", "$(curl -fsSL https://git.phoenix.ipv64.de/public/warp4j/raw/branch/feature/update_install_script/install)"]
+RUN curl -s https://git.phoenix.ipv64.de/public/warp4j/raw/branch/feature/update_install_script/install | /bin/sh -s
 ENTRYPOINT [ "/usr/local/bin/warp4j" ]

install

@@ -83,11 +83,11 @@ install() {
         fail
     fi
     echo "Creating $LOCATION/$name..."
-    sudo install -D \
+    su -c "install -D \
         --mode=755 \
         --owner=root \
         --group=root \
-        "$temp_location" "$LOCATION"
+        '$temp_location' '$LOCATION'"
     if [ $? != 0 ]; then
         echo "Error: Failed to install $name" >&2
         fail