Update Dockerfile

Signed-off-by: techopsmasters <163403479+techopsmasters@users.noreply.github.com>

django/app/Dockerfile

@@ -1,6 +1,6 @@
 # syntax=docker/dockerfile:1.4
 
-FROM --platform=$BUILDPLATFORM python:3.7-alpine AS builder
+FROM python:3.7-alpine AS builder
 EXPOSE 8000
 WORKDIR /app 
 COPY requirements.txt /app