Fixed wait for db

app/wait_for_db.py

@@ -2,8 +2,9 @@ import socket
 import time
 import os
 
-port = int(os.environ["SQL_PORT"]) # 5432
-db_name = os.environ["SQL_DATABASE"]
+port = int(os.environ.get("SQL_PORT")) # 5432
+db_name = os.environ.get("SQL_HOST")
+print(f"database at {db_name}:{port}")
 
 s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 while True:
@@ -11,5 +12,5 @@ while True:
         s.connect((db_name, port))
         s.close()
         break
-    except socket.error as ex:
+    except socket.error:
         time.sleep(0.1)