NOISSUE - Fix building UI docker image for arm (#806)

* Add entrypoint in arm Dockerfile
Switch from ash to dash in entrypoint script

Signed-off-by: Ivan Milošević <iva@blokovi.com>

* Add new line on file end

Signed-off-by: Ivan Milošević <iva@blokovi.com>

ui/docker/Dockerfile.arm

@@ -22,3 +22,6 @@ COPY --from=builder /app/main.js /usr/share/nginx/html
 COPY --from=builder /app/css/mainflux.css /usr/share/nginx/html/css/
 COPY --from=builder /app/src/Websocket.js /usr/share/nginx/html/src/
 COPY --from=builder /app/docker/nginx.conf /etc/nginx/conf.d/default.conf
+COPY docker/entrypoint.sh /entrypoint.sh
+
+ENTRYPOINT ["/entrypoint.sh"]

ui/docker/entrypoint.sh

@@ -1,4 +1,4 @@
-#!/bin/ash
+#!/bin/sh
 
 if [ -n "$MF_UI_PORT" ]; then
     sed -i -e "s/MF_UI_PORT/$MF_UI_PORT/" /etc/nginx/conf.d/default.conf