Unable to connect to a local PostgreSQL database running on docker with TypeORM + pgAdmin4

I have a postgres database hosted in docker running on localhost with the default postgres port 5432 but I am unable to connect to the database at all via either pgAdmin4 or TypeORM. Both throw the same error saying invalid password.

I am using the following docker-compose.yml file to create the database:

version: '3.8'
services: 
    db:
        image: postgres
        volumes:
            - ./pgdata:/var/lib/postgresql/data
        ports: 
            - '5432:5432'
        environment: 
            POSTGRES_DB: maindb
            POSTGRES_USER: admin
            POSTGRES_PASSWORD: admin

I would therefore expect to be able to connect to the database via pgAdmin4 by entering the default port 5432 on localhost ( also tried localhost ip 127.0.0.1 ) however when I try to login with the following credentials ( you have to trust me that the password is correct typed and retyped 10 times and copy pasted ) When I then press login I get the following error:

Unable to connect to server:

FATAL: password authentication failed for user "admin"

This is really strange as I see no reason as to why it would fail. I am 100% sure the environment variables got passed through as on docker desktop I can see that they are the same.

I also tried to connect to the database via TypeORM in the following manner:

createConnection({
    type: 'postgres',
    host: 'localhost',
    port: 5432,
    username: 'admin',
    password: 'admin',
    database: 'maindb',
    entities: [App],
    synchronize: true,
    logging: false,
})
    .then(connection => console.log('Logged in'))
    .catch(error => console.log(error));

and I get this error message:

error: password authentication failed for user "admin"
REMOVED PATHS FOR CONCISENESS
 {
  length: 97,
  severity: 'FATAL',
  code: '28P01',
  detail: undefined,
  hint: undefined,
  position: undefined,
  internalPosition: undefined,
  internalQuery: undefined,
  where: undefined,
  schema: undefined,
  table: undefined,
  column: undefined,
  dataType: undefined,
  constraint: undefined,
  file: 'auth.c',
  line: '285',
  routine: 'auth_failed'
}

I also see no reason why this should fail. I wonder if it is a PostgreSQL problem or a docker problem? Potentially it is easier for me to switch DB provider?

Edit 1

Here are the logs from the start up:

Attaching to backend_db_1

db_1 | The files belonging to this database system will be owned by user "postgres".

db_1 | This user must also own the server process.

db_1 |

db_1 | The database cluster will be initialized with locale "en_US.utf8".

db_1 | The default database encoding has accordingly been set to "UTF8".

db_1 | The default text search configuration will be set to "english".

db_1 |

db_1 | Data page checksums are disabled.

db_1 |

db_1 | fixing permissions on existing directory /var/lib/postgresql/data ... ok

db_1 | creating subdirectories ... ok

db_1 | selecting dynamic shared memory implementation ... posix

db_1 | selecting default max_connections ... 100

db_1 | selecting default shared_buffers ... 128MB

db_1 | selecting default time zone ... Etc/UTC

db_1 | creating configuration files ... ok

db_1 | running bootstrap script ... ok

db_1 | performing post-bootstrap initialization ... ok

db_1 | initdb: warning: enabling "trust" authentication for local connections

db_1 | You can change this by editing pg_hba.conf or using the option -A, or

db_1 | --auth-local and --auth-host, the next time you run initdb.

db_1 | syncing data to disk ... ok

db_1 |

db_1 |

db_1 | Success. You can now start the database server using:

db_1 |

db_1 | pg_ctl -D /var/lib/postgresql/data -l logfile start

db_1 |

db_1 | waiting for server to start....2020-08-12 09:26:47.682 UTC [48] LOG: starting PostgreSQL 12.3 (Debian 12.3-1.pgdg100+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 8.3.0-6) 8.3.0, 64-bit

db_1 | 2020-08-12 09:26:47.685 UTC [48] LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"

db_1 | 2020-08-12 09:26:47.744 UTC [49] LOG: database system was shut down at 2020-08-12 09:26:44 UTC

db_1 | 2020-08-12 09:26:47.770 UTC [48] LOG: database system is ready to accept connections

db_1 | done

db_1 | server started

db_1 | CREATE DATABASE

db_1 |

db_1 |

db_1 | /usr/local/bin/docker-entrypoint.sh: ignoring /docker-entrypoint-initdb.d/*

db_1 |

db_1 | 2020-08-12 09:26:50.836 UTC [48] LOG: received fast shutdown request

db_1 | waiting for server to shut down....2020-08-12 09:26:50.847 UTC [48] LOG: aborting any active transactions

db_1 | 2020-08-12 09:26:50.849 UTC [48] LOG: background worker "logical replication launcher" (PID 55) exited with exit code 1

db_1 | 2020-08-12 09:26:50.850 UTC [50] LOG: shutting down

db_1 | 2020-08-12 09:26:50.929 UTC [48] LOG: database system is shut down

db_1 | done

db_1 | server stopped

db_1 |

db_1 | PostgreSQL init process complete; ready for start up.

db_1 |

db_1 | 2020-08-12 09:26:50.971 UTC [1] LOG: starting PostgreSQL 12.3 (Debian 12.3-1.pgdg100+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 8.3.0-6) 8.3.0, 64-bit

db_1 | 2020-08-12 09:26:50.984 UTC [1] LOG: listening on IPv4 address "0.0.0.0", port 5432

db_1 | 2020-08-12 09:26:50.984 UTC [1] LOG: listening on IPv6 address "::", port 5432

db_1 | 2020-08-12 09:26:50.997 UTC [1] LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"

db_1 | 2020-08-12 09:26:51.051 UTC [66] LOG: database system was shut down at 2020-08-12 09:26:50 UTC

db_1 | 2020-08-12 09:26:51.080 UTC [1] LOG: database system is ready to accept connections