Change default database name (#13)

This reflects changes made to the database container image.

Change database environment variables prefixes to be implementation agnostic.

app/config.py

@@ -2,9 +2,9 @@
 
 BASE_DIR = os.path.dirname(os.path.abspath(__file__))
 
-DB_NAME = os.getenv("SQLALCHEMY_DB", "release_notes_db")
-DB_USER = os.getenv("SQLALCHEMY_USER", "postgres")
-DB_PASSWORD = os.getenv("SQLALCHEMY_PASSWORD", "password")
+DB_NAME = os.getenv("DB_NAME", "digital_roadmap")
+DB_USER = os.getenv("DB_USER", "postgres")
+DB_PASSWORD = os.getenv("DB_PASSWORD", "password")
 DB_HOST = os.getenv("DB_HOST", "localhost")
 DB_PORT = os.getenv("DB_PORT", 5432)
 SQLALCHEMY_DATABASE_URI = f"postgresql+psycopg://{DB_USER}:{DB_PASSWORD}@{DB_HOST}:{DB_PORT}/{DB_NAME}"