Install mealie as CLI command, use in Dockerfile

* Remove assumption about the root of the mealie package being on the
  Python path (change "app:app" -> "mealie.app:app" in `main.py`).
* Remove `start` entrypoint because it is not used and the name "start"
  is too generic.`

docker/entry.sh

@@ -41,4 +41,4 @@ init
 # Start API
 HOST_IP=`/sbin/ip route|awk '/default/ { print $3 }'`
 
-exec python /app/mealie/main.py
+exec mealie

mealie/main.py

@@ -6,7 +6,7 @@
 
 def main():
     uvicorn.run(
-        "app:app",
+        "mealie.app:app",
         host=settings.API_HOST,
         port=settings.API_PORT,
         log_level=settings.LOG_LEVEL.lower(),

pyproject.toml

@@ -6,7 +6,7 @@ name = "mealie"
 version = "2.1.0"
 
 [tool.poetry.scripts]
-start = "mealie.app:main"
+mealie = "mealie.main:main"
 
 [tool.poetry.dependencies]
 Jinja2 = "^3.1.2"