update docker hostnames to avoid conflicts when sharing network

docker-compose.example.yml

@@ -2,6 +2,7 @@ version: '3.9'
 
 services:
   web:
+    hostname: heartbeats-web
     build: 
       context: .
       dockerfile: ./web/Dockerfile
@@ -14,12 +15,14 @@ services:
       - BASE_URL=http://localhost:8464
 
   redis:
+    hostname: heartbeats-redis
     image: redis
     restart: unless-stopped
     volumes:
       - './redis-data:/data'
 
   populater:
+    hostname: heartbeats-populater
     build: 
       context: .
       dockerfile: ./populater/Dockerfile

populater/src/app.py

@@ -16,7 +16,7 @@ CLIENT_SECRET = os.environ.get('CLIENT_SECRET', None)
 if CLIENT_SECRET is None:
     raise ValueError("CLIENT_SECRET cannot be None, set using environment variable")
 
-db = Db('redis', 6379, 0, CLIENT_ID, CLIENT_SECRET)
+db = Db('heartbets-redis', 6379, 0, CLIENT_ID, CLIENT_SECRET)
 
 
 def get_args():

web/src/app.py

@@ -28,7 +28,7 @@ BASE_URL = os.environ.get('BASE_URL', None)
 if BASE_URL is None:
     raise ValueError("BASE_URL cannot be None, set using environtment variable")
 
-db = Db('redis', 6379, 0, CLIENT_ID, CLIENT_SECRET)
+db = Db('heartbeats-redis', 6379, 0, CLIENT_ID, CLIENT_SECRET)
 
 SPOTIFY_AUTHORIZE_ENDPOINT = os.environ.get('SPOTIFY_AUTHORIZE_ENDPOINT', 'https://accounts.spotify.com/authorize?')
 SPOTIFY_TOKEN_ENDPOINT = os.environ.get('SPOTIFY_AUTHORIZE_ENDPOINT', 'https://accounts.spotify.com/api/token')