PPHA-369: Configure db with common var names

Terraform requires different var names to our local postgres container
Duplicate for now until we find a more common solution

Author: Themitchell

.env.example

@@ -1,9 +1,13 @@
 DEBUG=True
 SECRET_KEY=somesercetkey
-DATABASE_URL=
 ALLOWED_HOSTS=localhost,127.0.0.1
 
-POSTGRES_HOST=db
+DATABASE_HOST=db
+DATABASE_NAME=lung_cancer_screening
+DATABASE_USER=lung_cancer_screening
+DATABASE_PASSWORD=password
+
+# Required to provision development / test postgres container
 POSTGRES_DB=lung_cancer_screening
 POSTGRES_USER=lung_cancer_screening
 POSTGRES_PASSWORD=password

lung_cancer_screening/settings.py

@@ -95,12 +95,12 @@ def boolean_env(key, default=None):
 DATABASES = {
     "default": {
         "ENGINE": "django.db.backends.postgresql",
-        "NAME": environ.get("POSTGRES_DB", ""),
-        "USER": environ.get("POSTGRES_USER", ""),
-        "PASSWORD": environ.get("POSTGRES_PASSWORD", ""),
-        "HOST": environ.get("POSTGRES_HOST", ""),
-        "PORT": "5432",
-        # "OPTIONS": {"sslmode": environ.get("DATABASE_SSLMODE", "prefer")},
+        "NAME": environ.get("DATABASE_NAME", ""),
+        "USER": environ.get("DATABASE_USER", ""),
+        "PASSWORD": environ.get("DATABASE_PASSWORD", ""),
+        "HOST": environ.get("DATABASE_HOST", ""),
+        "PORT": environ.get("DATABASE_PORT", "5432"),
+        "OPTIONS": {"sslmode": environ.get("DATABASE_SSLMODE", "prefer")},
     }
 }