| # Use the official PostgreSQL image as the base image | |
| FROM postgres:13 | |
| # Set the environment variables for the PostgreSQL database | |
| ENV POSTGRES_DB=mydb | |
| ENV POSTGRES_USER=myuser | |
| ENV POSTGRES_PASSWORD=mypassword | |
| # Create a custom user and group for PostgreSQL | |
| RUN groupadd -r postgres && useradd -r -g postgres postgres | |
| # Set the ownership of the data directory | |
| RUN mkdir -p /var/lib/postgresql/data && chown -R postgres:postgres /var/lib/postgresql/data | |
| # Copy the init.sql file to the container | |
| COPY init.sql /docker-entrypoint-initdb.d/ | |
| # Expose the default PostgreSQL port | |
| EXPOSE 5432 | |
| # Run the PostgreSQL process as the custom user | |
| USER postgres | |
| # Start the PostgreSQL server when the container is launched | |
| CMD ["postgres"] | |