Rodando a aplicacao com Docker (necessário ter instalado o docker e o docker-compose)

docker-compose build
docker-compose up -d
python models.py  
python start.py
gunicorn -b 0.0.0.0:9000 app:server --timeout 300

##No navegador:
localhost:9000

Rodando a aplicacao sem docker

Configuracoes de banco

sudo apt-get update
sudo apt-get install postgresql postgresql-contrib

configurar o pg_hba.conf

cd /etc/postgresql/10/main 
sudo gedit pg_hba.conf

nas ultimas linhas, troque pelas seguintes linhas

# DO NOT DISABLE!
# If you change this first entry you will need to make sure that the
# database superuser can access the database using some other method.
# Noninteractive access to all databases is required during automatic
# maintenance (custom daily cronjobs, replication, and similar tasks).
#
# Database administrative login by Unix domain socket
local   all             postgres                                trust

# TYPE  DATABASE        USER            ADDRESS                 METHOD

# "local" is for Unix domain socket connections only
local   all             all                                     trust
# IPv4 local connections:
host    all             all             127.0.0.1/32            trust
# IPv6 local connections:
host    all             all             ::1/128                 trust
# Allow replication connections from localhost, by a user with the
# replication privilege.
local   replication     all                                     trust
host    replication     all             127.0.0.1/32            trust
host    replication     all             ::1/128                 trust

criar o banco local

sudo service postgresql restart
sudo -u postgres psql       # abre o prompt do postgres 
CREATE DATABASE peoplecounter;

Criar ambiente virtual (dentro da pasta do projeto peoplecounter)

pip install virtualenv
virtualenv -p python3 venv

Ativar ambiente virtual

source venv/bin/activate

Instalar dependencias

pip3 install -r requirements.txt

Criar banco local (rodar esse somente uma vez)

python3 models.py

Rodar contador de pessoas

python3 start.py

Para ver o conteudo do banco

sudo -u postgres psql
\c peoplecounter;

exemplo de select

select c.camera_id, c.nome as camera, l.nome as local, l.endereco, cl.nome as cliente 
from cameras c 
left join locais l on c.local_id = l.local_id 
left join clientes cl ON l.cliente_id = cl.cliente_id;