chore: pick backend settings from env vars

Signed-off-by: Ameya Shenoy <shenoy.ameya@gmail.com>

backend/backend/settings.py

@@ -10,6 +10,7 @@ For the full list of settings and their values, see
 https://docs.djangoproject.com/en/3.1/ref/settings/
 """
 
+import os
 from pathlib import Path
 
 # Build paths inside the project like this: BASE_DIR / 'subdir'.
@@ -21,12 +22,13 @@ BASE_DIR = Path(__file__).resolve().parent.parent
 
 # TODO: remove this key
 # SECURITY WARNING: keep the secret key used in production secret!
-SECRET_KEY = 'eo$1gb^g#gx25$b$(9hp#i^av^t0e8ge#kjcr$g(=yimc#j1-l'
+# SECRET_KEY = 'eo$1gb^g#gx25$b$(9hp#i^av^t0e8ge#kjcr$g(=yimc#j1-l'
+SECRET_KEY = os.environ.get('SECRET_KEY')
 
 # SECURITY WARNING: don't run with debug turned on in production!
-DEBUG = True
+DEBUG = bool(os.environ.get('DEBUG'))
 
-ALLOWED_HOSTS = []
+ALLOWED_HOSTS = os.environ.get('ALLOWED_HOSTS').split(',')
 
 
 # Application definition
@@ -87,23 +89,22 @@ WSGI_APPLICATION = 'backend.wsgi.application'
 DATABASES = {
     'default': {
         'ENGINE': 'django.db.backends.postgresql',
-        'NAME': 'bullish',
-        'USER': 'bullish',
-        'PASSWORD': 'password',
-        'HOST': 'db',
-        'PORT': '5432',
+        'NAME': os.environ.get("POSTGRES_DB"),
+        'USER': os.environ.get("POSTGRES_USER"),
+        'PASSWORD': os.environ.get("POSTGRES_PASSWORD"),
+        'HOST': os.environ.get("POSTGRES_SERVER"),
+        'PORT': os.environ.get("POSTGRES_PORT"),
     }
 }
 
 CACHES = {
     'default': {
         'BACKEND': 'django_redis.cache.RedisCache',
-        'LOCATION': 'redis://redis:6379/1',
+        'LOCATION': f'redis://{os.environ.get("REDIS_HOST")}:{os.environ.get("REDIS_PORT")}/{os.environ.get("REDIS_CACHE_DB")}',
         'OPTIONS': {
             'CLIENT_CLASS': 'django_redis.client.DefaultClient',
             "REDIS_CLIENT_CLASS": "redis.client.StrictRedis",
             "REDIS_CLIENT_KWARGS": {"decode_responses": True},
-            # Custom serializer
             "SERIALIZER": "app.redis.JSONSerializer",
         },
     },
@@ -142,16 +143,13 @@ USE_L10N = True
 USE_TZ = True
 
 # TODO: fix hardcoded cross allowed origins
-CORS_ALLOWED_ORIGINS = [
-    "http://localhost:8080",
-    "http://127.0.0.1:8080",
-]
+CORS_ALLOWED_ORIGINS = os.environ.get('CORS_ALLOWED_ORIGINS').split(',')
 
 RQ_QUEUES = {
     'default': {
-        'HOST': 'redis',
-        'PORT': 6379,
-        'DB': 0,
+        'HOST': os.environ.get("REDIS_HOST"),
+        'PORT': os.environ.get("REDIS_PORT"),
+        'DB': os.environ.get("REDIS_QUEUE_DB"),
         'DEFAULT_TIMEOUT': 360,
     },
 }

dev.env

@@ -0,0 +1,15 @@
+SECRET_KEY=sample
+DEBUG=true
+ALLOWED_HOSTS=example.com,example.xyz,*
+CORS_ALLOWED_ORIGINS=http://localhost:8080,http://127.0.0.1:8080
+REDIS_HOST=redis
+REDIS_PORT=6379
+REDIS_CACHE_DB=1
+REDIS_QUEUE_DB=0
+PGDATA=/var/lib/postgresql/data/pgdata
+POSTGRES_SERVER=db
+POSTGRES_USER=bullish
+POSTGRES_PASSWORD=password
+POSTGRES_DB=bullish
+POSTGRES_PORT=5432
+

docker-compose.yml

@@ -9,6 +9,8 @@ services:
       context: ./backend
     volumes:
       - ./backend:/code
+    env_file:
+      - dev.env
     depends_on:
       - db
       - rqworker
@@ -35,6 +37,8 @@ services:
     image: codingcoffee/bullish-backend
     build:
       context: ./backend
+    env_file:
+      - dev.env
     volumes:
       - ./backend:/code
     command: python manage.py rqworker default
@@ -45,6 +49,8 @@ services:
     image: codingcoffee/bullish-backend
     build:
       context: ./backend
+    env_file:
+      - dev.env
     volumes:
       - ./backend:/code
     command: python manage.py rqscheduler
@@ -57,12 +63,8 @@ services:
     volumes:
       - bullish-db-data:/var/lib/postgresql/data/pgdata
     # TODO: remove pass
-    environment:
-      - PGDATA=/var/lib/postgresql/data/pgdata
-      - POSTGRES_SERVER=db
-      - POSTGRES_USER=bullish
-      - POSTGRES_PASSWORD=password
-      - POSTGRES_DB=bullish
+    env_file:
+      - dev.env
     # ports:
     #   - 5432:5432