feat: read LMS URL from environment variable

config.sample.yml

@@ -1,4 +1,6 @@
+# Or alternatively use `OPENEDX_LMS_URL` configuration or `OPENEDX_LMS_URL` environment variable
 LMS_SERVER_URL: https://lms.ENV.nau.fccn.pt
+
 DIGITAL_SIGNATURE:
   CERTIFICATE_P12_PATH: ./digital_signature_dev/sign-pdf.dev.nau.fccn.pt.p12
   CERTIFICATE_P12_PASSWORD: "1234"

docker-compose.yml

@@ -10,4 +10,5 @@ services:
       - ./digital_signature_dev:/app/digital_signature_dev
     ports:
       - "5000:5000"
-
+    environment:
+      - OPENEDX_LMS_URL=https://lms.dev.nau.fccn.pt

nau/course/certificate/course_certificate_to_pdf.py

@@ -13,6 +13,7 @@
 from nau.course.certificate.cut_pdf import cut_pdf_limit_pages
 from requests.auth import HTTPBasicAuth
 from nau.course.certificate.digital_sign_pdf import digital_sign_pdf
+import os
 
 from urllib.parse import parse_qs
 
@@ -47,7 +48,9 @@ def __init__(self, config: Configuration, path: str, query_string: str):
         self._language = language_query_values[0] if language_query_values else None
 
         # https://lms.dev.nau.fccn.pt
-        lms_server_url = self._config['LMS_SERVER_URL']
+        lms_server_url = self._config.get('LMS_SERVER_URL', self._config.get('OPENEDX_LMS_URL', os.getenv('OPENEDX_LMS_URL')))
+        if not lms_server_url:
+            raise Exception("Bad configuration, configure `LMS_SERVER_URL` or `OPENEDX_LMS_URL` on the config.yml or alternatively `OPENEDX_LMS_URL` environment variable.")
         self._url = lms_server_url + '/' + path
         if query_string and len(query_string) > 0:
             self._url += "?" + query_string.decode('ascii')