Bugfixes in docker-compose and DB, gunicorn for prod, env vars for app host and port

Makefile

@@ -1,9 +1,14 @@
+APP_HOST ?= 0.0.0.0
+APP_PORT ?= 8000
+
 dev:
 	python3 -m dotenv -f .env_debug run \
-	python3 -m uvicorn main:app --reload
+	make cmd-dev
 
 prod:
-	python3 -m uvicorn main:app
+	python3 -m gunicorn \
+	-w 4 -k uvicorn.workers.UvicornWorker \
+	-b $${APP_HOST}:$${APP_PORT} main:app
 
 format:
 	python3 -m autopep8 -r --in-place app/
@@ -30,6 +35,12 @@ clean:
 	rm -rf __pycache__
 	rm -rf .mypy_cache
 
+cmd-dev:
+	python3 -m uvicorn main:app \
+	--reload \
+	--host $${APP_HOST} \
+	--port $${APP_PORT}
+
 cmd-docker-build:
 	docker build \
 	-t ${REPO_OWNER_LOWER}/${REPO_NAME_SNAKE}:latest \