try new dockerfile

dockerfile

@@ -1,17 +1,17 @@
-FROM python:3
+FROM python:3.11-slim
 
 ENV PYTHONUNBUFFERED 1
 
 WORKDIR /code/
 
+# Copy only the requirements file first (Changes infrequently)
 COPY requirements.txt ./
-COPY django_code ./
 
+# Install dependencies. This layer is highly cacheable by BuildKit + GHA setup.
+RUN pip install --no-cache-dir -r requirements.txt
 
+# Copy the rest of your application code (Changes frequently, invalidates subsequent cache)
+COPY . ./
 
-RUN --mount=type=cache,target=/root/.cache/pip pip install --upgrade pip
-RUN --mount=type=cache,target=/root/.cache/pip pip install --no-cache-dir -r requirements.txt
-COPY . .
-RUN python django_code/manage.py migrate
-
+# CMD is the command run when the container starts
 CMD [ "python","django_code/manage.py","runserver","0.0.0.0:8000" ]