Use waitress and fix docker bugs

docker/Dockerfile

@@ -10,4 +10,6 @@ COPY . .
 
 EXPOSE 5000
 
-CMD ["gunicorn", "--preload", "-w", "4", "-b", "0.0.0.0:5000", "app:app"]
+STOPSIGNAL SIGTERM
+
+CMD ["python", "app.py"]

docker/docker-compose.yml

@@ -5,8 +5,8 @@ services:
     build:
       context: ../src
       dockerfile: ../docker/Dockerfile
-    ports:
-      - 5000:5000
+    network_mode: host
+    stop_signal: SIGTERM
     environment:
       FLASK_ENV: production
     volumes:

src/.env.dev

@@ -1,6 +1,6 @@
 DATABASE=sqlite:///endpoints.db
-API_HOST=RoomF7203.local
-SERVICE_NAME=RoomF7203
+API_HOST=room7200.local
+SERVICE_NAME=room7200
 SERVICE_TYPE=_http._tcp.local.
 SERVICE_IP=192.168.137.1
 SERVICE_PORT=5000

src/app.py

@@ -1,4 +1,8 @@
+import signal
+import sys
+
 from flask import Flask, render_template
+from waitress import serve
 
 from api import api
 from config import API_HOST, DATABASE_URI
@@ -13,6 +17,14 @@ app.register_blueprint(api)
 init_db(app)
 
 
+def handle_exit(*args):
+    unregister_service()
+    sys.exit(0)
+
+
+signal.signal(signal.SIGTERM, handle_exit)
+
+
 @app.route("/")
 def homepage():
     endpoints = get_endpoints_from_db()
@@ -23,6 +35,6 @@ if __name__ == "__main__":
     register_service()
 
     try:
-        app.run(host="0.0.0.0", port=5000)
+        serve(app, host="0.0.0.0", port=5000)
     finally:
         unregister_service()