Second try

Dockerfile

@@ -1,47 +1,33 @@
 FROM python:3.8.1-slim-buster
 
-RUN useradd wagtail
+ENV PYTHONUNBUFFERED=1
 
-# Set working directory
-WORKDIR /app
-
-# Set environment variables
-ENV PYTHONUNBUFFERED=1 \
-    PORT=8000
-
-# Install system packages required by Wagtail and Django
-RUN apt-get update --yes --quiet && apt-get install --yes --quiet --no-install-recommends \
+# Install system dependencies
+RUN apt-get update --yes && apt-get install --yes --no-install-recommends \
     build-essential \
     libpq-dev \
-    libmariadbclient-dev \
     libjpeg62-turbo-dev \
     zlib1g-dev \
     libwebp-dev \
+    gettext \
  && rm -rf /var/lib/apt/lists/*
 
-# Upgrade pip to the latest version
-RUN pip install --upgrade pip
+# Add and set up the working directory
+WORKDIR /app
 
-# Install the application server
-RUN pip install "gunicorn==20.0.4"
+# Copy requirements file and install dependencies
+COPY requirements.txt /app/
+RUN pip install --upgrade pip \
+    && pip install -r /app/requirements.txt
 
-COPY requirements.txt /app/requirements.txt
-RUN pip install -r /app/requirements.txt
-
-# Copy the source code of the project into the container
-COPY --chown=wagtail:wagtail . .
-
-# Set this directory to be owned by the "wagtail" user
-RUN chown wagtail:wagtail /app
-
-# Use user "wagtail" to run the build commands below and the server itself
-USER wagtail
+# Copy application code
+COPY . /app/
 
 # Collect static files
 RUN python manage.py collectstatic --noinput --clear
 
-# Port used by this container to serve HTTP
+# Expose the port the app runs on
 EXPOSE 8000
 
-# Runtime command that executes when "docker run" is called
-CMD ["sh", "-c", "python manage.py migrate --noinput && gunicorn saburly.wsgi:application"]
+# Run the application server
+CMD ["gunicorn", "--bind", "0.0.0.0:8000", "saburly.wsgi:application"]