Add command-line argument parsing for API server port configuration

fair_eva/__init__.py

@@ -1,14 +1,34 @@
 #!/usr/bin/env python3
 
+import argparse
+
 import connexion
 from connexion.resolver import RestyResolver
 
 
+def set_parser():
+    parser = argparse.ArgumentParser(description="FAIR EVA API server")
+
+    parser.add_argument(
+        "-p",
+        "--port",
+        type=int,
+        metavar="PORT",
+        dest="port",
+        default=9090,
+        help="Port number where API server will run (default: 9090)",
+    )
+
+    return parser.parse_args()
+
+
 def main():
+    options_cli = set_parser()
+
     app = connexion.FlaskApp(__name__)
     app.add_api(
         "fair-api.yaml",
         arguments={"title": "FAIR evaluator"},
         resolver=RestyResolver("fair_eva.api"),
     )
-    app.run(port=9090)
+    app.run(port=options_cli.port)

requirements.txt

@@ -26,3 +26,4 @@ geopandas==1.0.1
 shapely==2.0.3
 prettytable
 pyarrow
+argparse