Update monitor.py to use .env instead of params.json

Complete the migration started in 42c89dc by updating the monitoring
script to load configuration from .env files using python-dotenv.

monitor.py

@@ -5,13 +5,14 @@ import sys
 import os
 import requests
 import time
-import json
+from dotenv import load_dotenv
 
+# Load environment variables from .env file
+load_dotenv(".env")
 
-def fread(filename):
+# Configuration from environment
-    """Read file and close the file."""
+stacosys_url = os.getenv("STACOSYS_URL", "")
-    with open(filename, "r") as f:
+external_check_cmd = os.getenv("EXTERNAL_CHECK", "")
-        return f.read()
 
 
 def get_comment_count():
@@ -20,11 +21,8 @@ def get_comment_count():
     Returns:
         int: Total comment count, or 0 if request fails
     """
-    req_url = params["stacosys_url"] + "/comments/count"
+    req_url = stacosys_url + "/comments/count"
-    query_params = dict(
+    resp = requests.get(url=req_url)
-        token=params["stacosys_token"]
-    )
-    resp = requests.get(url=req_url, params=query_params)
     return 0 if not resp.ok else int(resp.json()["count"])
 
 
@@ -33,18 +31,6 @@ def _exit_program():
     sys.exit(0)
 
 
-# Default parameters.
-params = {
-    "stacosys_token": "",
-    "stacosys_url": "",
-    "external_check": "",
-}
-
-# If params.json exists, load it.
-if os.path.isfile("params.json"):
-    params.update(json.loads(fread("params.json")))
-
-external_check_cmd = params["external_check"]
 initial_count = get_comment_count()
 print(f"Comments = {initial_count}")
 while True: