Podman built -t failed in localhost

[PunkFleet]

I want to build my django service as an image to be able to push it to the server for deployment. I am using wsgi,asgi,redis,postgres,celery services in my django service. I want to use podman-compose but i choose build image first after checking this:https://www.redhat.com/sysadmin/compose-podman-pods Now, it encounters an error while building:

[notice] A new release of pip is available: 24.0 -> 24.1.1
[notice] To update, run: pip install --upgrade pip
--> 44d3b76c7400
STEP 5/12: COPY . .
--> cbadc4a246e4
STEP 6/12: EXPOSE 8000
--> 2fc2251fc240
STEP 7/12: RUN python manage.py makemigrations
/usr/local/lib/python3.12/site-packages/django/core/management/commands/makemigrations.py:160: RuntimeWarning: Got an error checking a consistent migration history performed for database connection 'default': connection failed: connection to server at "127.0.0.1", port 5432 failed: Connection refused
        Is the server running on that host and accepting TCP/IP connections?
  warnings.warn(
No changes detected
--> 6ae77d5cad22
STEP 8/12: RUN python manage.py migrate
Traceback (most recent call last):
  File "/usr/local/lib/python3.12/site-packages/django/db/backends/base/base.py", line 275, in ensure_connection
    self.connect()
  File "/usr/local/lib/python3.12/site-packages/django/utils/asyncio.py", line 26, in inner
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/django/db/backends/base/base.py", line 256, in connect
    self.connection = self.get_new_connection(conn_params)
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/django/utils/asyncio.py", line 26, in inner
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/django/db/backends/postgresql/base.py", line 277, in get_new_connection
    connection = self.Database.connect(**conn_params)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/psycopg/connection.py", line 748, in connect
    raise last_ex.with_traceback(None)
psycopg.OperationalError: connection failed: connection to server at "127.0.0.1", port 5432 failed: Connection refused
        Is the server running on that host and accepting TCP/IP connections?

This is the content of my containerfile file:

# Use the official Python image as the base image
FROM python:3.12-slim

# Set the working directory inside the container
WORKDIR /app
COPY requirements.txt .
# Install dependencies
RUN pip install --no-cache-dir -r requirements.txt

# Copy the rest of the application code to the container
COPY . .
EXPOSE 8000

RUN python manage.py makemigrations
RUN python manage.py migrate
RUN python manage.py collectstatic --noinput

# Specify the command to run your Django app
CMD ["gunicorn", "--workers=3", "--bind=0.0.0.0:8000", "main.wsgi:application", "&&", \
     "daphne", "-b", "0.0.0.0", "-p", "8001", "main.asgi:application" ]

and this postgres info:

DB_NAME=dbtest
DB_USER=dbuser
DB_PASSWORD=12345678
DB_HOST=localhost
DB_PORT=5432

I already pull images of postgres, redis . and using same pod by run

podman run --name postgres --pod mypod -d postgres:latest                                                                                           


podman run --name postgres --pod mypod -e POSTGRES_HOST=127.0.0.1 -e POSTGRES_PORT=5432 -e POSTGRES_DB=dbtest -e POSTGRES_USER=dbuser -e POSTGRES_PASSWORD=12345678 -d postgres:latest

There are very few tutorials on the web for podman. I'm new to podman and was able to build it solely on chatgpt and redhat's bits and pieces of themed blogs. Any help and suggestions would be appreciated!

[PunkFleet]

What I want to do is when my build is done, try the first deployment and if it works. I will follow this method for production.
I'm running multiple containers in a single pod, including a front-end nextjs project, nginx, back-end django project, postgres, redis, celery