Fix MQTT connection

api-customer/app.py

@@ -1,3 +1,4 @@
+import os
 import uuid
 
 from flask import Flask
@@ -8,21 +9,27 @@ client_id = "1"
 
 app = Flask(__name__)
 
+local_broker_address = os.environ.get("LOCAL_BROKER_ADDRESS", "127.0.0.1")
+local_broker_port = int(os.environ.get("LOCAL_BROKER_PORT", 1883))
+
+api_broker_address = os.environ.get("API_BROKER_ADDRESS", "127.0.0.1")
+api_broker_port = int(os.environ.get("API_BROKER_PORT", 1883))
+
 @app.route('/')
 def hello_world():
     return 'Hello World!'
 
 if __name__ == '__main__':
     local_broker = MQTTService(
-        "127.0.0.1",
-        1883,
+        local_broker_address,
+        local_broker_port,
         username="pi-1",
         password="hepl",
     )
 
     api_broker = MQTTService(
-        "192.168.15.120",
-        1883,
+        api_broker_address,
+        api_broker_port,
         username="rpi",
         password="hepl",
     )