activatee9303-ad03-4a4d-8b71-ed03299efea3:/app/code# source /app/code/taiga/bin/a
(taiga) root@669e9303-ad03-4a4d-8b71-ed03299efea3:/app/code# cd /app/code/taiga-back
(taiga) root@669e9303-ad03-4a4d-8b71-ed03299efea3:/app/code/taiga-back# python manage.py migrate taiga_contrib_slack
Traceback (most recent call last):
  File "/app/code/taiga/lib/python3.8/site-packages/django/db/backends/base/base.py", line 217, in ensure_connection
    self.connect()
  File "/app/code/taiga/lib/python3.8/site-packages/django/db/backends/base/base.py", line 195, in connect
    self.connection = self.get_new_connection(conn_params)
  File "/app/code/taiga/lib/python3.8/site-packages/django/db/backends/postgresql/base.py", line 178, in get_new_connection
    connection = Database.connect(**conn_params)
  File "/app/code/taiga/lib/python3.8/site-packages/psycopg2/__init__.py", line 127, in connect
    conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
psycopg2.OperationalError: 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?


The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "manage.py", line 17, in <module>
    execute_from_command_line(sys.argv)
  File "/app/code/taiga/lib/python3.8/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line
    utility.execute()
  File "/app/code/taiga/lib/python3.8/site-packages/django/core/management/__init__.py", line 375, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/app/code/taiga/lib/python3.8/site-packages/django/core/management/base.py", line 323, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/app/code/taiga/lib/python3.8/site-packages/django/core/management/base.py", line 364, in execute
    output = self.handle(*args, **options)
  File "/app/code/taiga/lib/python3.8/site-packages/django/core/management/base.py", line 83, in wrapped
    res = handle_func(*args, **kwargs)
  File "/app/code/taiga/lib/python3.8/site-packages/django/core/management/commands/migrate.py", line 87, in handle
    executor = MigrationExecutor(connection, self.migration_progress_callback)
  File "/app/code/taiga/lib/python3.8/site-packages/django/db/migrations/executor.py", line 18, in __init__
    self.loader = MigrationLoader(self.connection)
  File "/app/code/taiga/lib/python3.8/site-packages/django/db/migrations/loader.py", line 49, in __init__
    self.build_graph()
  File "/app/code/taiga/lib/python3.8/site-packages/django/db/migrations/loader.py", line 212, in build_graph
    self.applied_migrations = recorder.applied_migrations()
  File "/app/code/taiga/lib/python3.8/site-packages/django/db/migrations/recorder.py", line 73, in applied_migrations
    if self.has_table():
  File "/app/code/taiga/lib/python3.8/site-packages/django/db/migrations/recorder.py", line 56, in has_table
    return self.Migration._meta.db_table in self.connection.introspection.table_names(self.connection.cursor())
  File "/app/code/taiga/lib/python3.8/site-packages/django/db/backends/base/base.py", line 256, in cursor
    return self._cursor()
  File "/app/code/taiga/lib/python3.8/site-packages/django/db/backends/base/base.py", line 233, in _cursor
    self.ensure_connection()
  File "/app/code/taiga/lib/python3.8/site-packages/django/db/backends/base/base.py", line 217, in ensure_connection
    self.connect()
  File "/app/code/taiga/lib/python3.8/site-packages/django/db/utils.py", line 89, in __exit__
    raise dj_exc_value.with_traceback(traceback) from exc_value
  File "/app/code/taiga/lib/python3.8/site-packages/django/db/backends/base/base.py", line 217, in ensure_connection
    self.connect()
  File "/app/code/taiga/lib/python3.8/site-packages/django/db/backends/base/base.py", line 195, in connect
    self.connection = self.get_new_connection(conn_params)
  File "/app/code/taiga/lib/python3.8/site-packages/django/db/backends/postgresql/base.py", line 178, in get_new_connection
    connection = Database.connect(**conn_params)
  File "/app/code/taiga/lib/python3.8/site-packages/psycopg2/__init__.py", line 127, in connect
    conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
django.db.utils.OperationalError: 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?

Can anyone help?