Create .env file to store default compose variables

- add build instruction to docker-compose.yml

.dockerignore

@@ -3,3 +3,4 @@
 __pycache__
 settings*.cfg
 client
+data

.env

+POSTGRES_USER=ics
+POSTGRES_PASSWORD=icspwd
+POSTGRES_DB=inventory_db
+PGDATA_VOLUME=./data/dev

.gitignore

@@ -3,3 +3,4 @@
 __pycache__
 *.pyc
 settings*.cfg
+/data

README.rst

@@ -11,10 +11,9 @@ You can use docker for development:
 
 1. Clone the repository
 
-2. Create the database::
+2. Create the database. Data will be stored under "./data" by default.
+   You can export the PGDATA_VOLUME variable to use another directory::
 
-    $ mkdir /data/pgdata
-    $ export PGDATA_VOLUME=/data/pgdata
     # Start only postgres so it has time to initialize
     $ docker-compose up -d postgres
     # Create the database

docker-compose.yml

@@ -3,6 +3,7 @@ services:
   web:
     image: inventory
     container_name: inventory_web
+    build: .
     environment:
       LOCAL_SETTINGS: /app/settings.cfg
       FLASK_APP: /app/wsgi.py
@@ -22,7 +23,7 @@ services:
     volumes:
       - ${PGDATA_VOLUME}:/var/lib/postgresql/data/pgdata
     environment:
-      POSTGRES_USER: ics
-      POSTGRES_PASSWORD: icspwd
-      POSTGRES_DB: inventory_db
+      POSTGRES_USER: ${POSTGRES_USER}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_DB: ${POSTGRES_DB}
       PGDATA: /var/lib/postgresql/data/pgdata