postgres container creating database but not creating tables and adding data - postgresql

Question

I'm trying to setup a postgres container with ansible, but the database isn't created completely. Via docker logs, it shows that the script has been executed entirely, but the result in always an empty database.
Playbook script:
- name: Run PostgreSQL container
become: no
docker_container:
env:
POSTGRES_PASSWORD: "{{ postgres_pw }}"
name: postgres
image: postgres:11
ports: "5432:5432"
restart_policy: unless-stopped
volumes:
- /tmp/{{ db_backup_file }}:/docker-entrypoint-initdb.d/{{ db_backup_file }}:ro
- pgdata:/var/lib/postgresql/data
sql file:
CREATE DATABASE database5;
--
-- TOC entry 647 (class 1247 OID 16548)
-- Name: geslacht; Type: TYPE; Schema: public; Owner: postgres
--
CREATE TYPE public.geslacht AS ENUM (
'm',
'v',
'x'
);
ALTER TYPE public.geslacht OWNER TO postgres;
SET default_tablespace = '';
--
-- TOC entry 197 (class 1259 OID 16555)
-- Name: antwoorden; Type: TABLE; Schema: public; Owner: postgres
--
CREATE TABLE public.antwoorden (
id integer NOT NULL,
bericht text NOT NULL,
gebruiker integer NOT NULL,
vraag integer NOT NULL,
gepost_op timestamp without time zone DEFAULT now() NOT NULL,
actief boolean DEFAULT true NOT NULL,
is_verkozen boolean DEFAULT false NOT NULL
);
Note: this is only a part of a script that creates all tables and adds sample data.
What's the reason why database5 is not being filled with the tables and data?