Fix default webapp port number. (#740)

Reviewed-on: #740
Co-authored-by: Thomas E Lackey <telackey@bozemanpass.com>
Co-committed-by: Thomas E Lackey <telackey@bozemanpass.com>

stack_orchestrator/data/compose/docker-compose-webapp-template.yml

@@ -5,4 +5,4 @@ services:
     environment:
       CERC_SCRIPT_DEBUG: ${CERC_SCRIPT_DEBUG}
     ports:
-      - "3000"
+      - "80"

stack_orchestrator/deploy/webapp/deploy_webapp.py

@@ -44,7 +44,7 @@ def _fixup_url_spec(spec_file_name: str, url: str):
     - host-name: {parsed_url.hostname}
       routes:
         - path: '{parsed_url.path if parsed_url.path else "/"}'
-          proxy-to: webapp:3000
+          proxy-to: webapp:80
     '''
     spec_file_path = Path(spec_file_name)
     with open(spec_file_path) as rfile: