completed: TODO-26 --> gunicorn now works

README

@@ -7,7 +7,7 @@
 # flask-bootstrap -> allows me to format that wtf form with boostrap markup - yet to test if it also means I don't need to include it exlicitly in head, etc.
 
 # install needed binaries (maybe I could have done this instead of pip below too -- when I docker this shit, sort it out?)
-sudo apt install python3-pip python3-psycopg2 libpq-dev
+sudo apt install python3-pip python3-psycopg2 libpq-dev python3-flask
 
 ### LEARN: supposedly could use virtualenv instead of pip3 install --user? OR even apt to install direct?
 # --user sticks python libs in ~/.local/[bin|lib|share]
@@ -16,7 +16,7 @@ pip3 install --user flask sqlalchemy flask-sqlalchemy flask-marshmallow SQLAlche
 ########################################################### FOR local RUN:
 
 # run a DEV version by:
-python3 main.py
+FLASK_APP=main FLASK_ENV=development flask run --host=192.168.0.2
 
 ### to make a new PROD copy..
 sudo docker-compose -f /srv/docker/config/docker-compose.yml stop bookdb_web
@@ -43,5 +43,3 @@ Maybe:
 	TODO-20:	ORM all books load is slow
 				- should I lazy load all books (ajax the 2nd->last pages in, or not use ORM, and do a quick db.execute()....)
 	TODO-21:	allow a way to add a book as a child of another existing book (opposite of rem_sub_book)
-
-TODO-26:	gunicorn and/or more modern non-flask???