Update .env

.env.sample

@@ -2,25 +2,25 @@
 CRAFT_ENVIRONMENT="production"
 
 # The database driver that will used ('mysql' or 'pgsql')
-CRAFT_DB_DRIVER="pgsql"
+DB_DRIVER="pgsql"
 
 # The database server name or IP address (usually this is 'localhost' or '127.0.0.1')
-CRAFT_DB_SERVER="postgres"
+DB_SERVER="postgres"
 
 # The database username to connect with
-CRAFT_DB_USER="craft3beta"
+DB_USER="craft3beta"
 
 # The database password to connect with
-CRAFT_DB_PASSWORD="secret"
+DB_PASSWORD="secret"
 
 # The name of the database to select
-CRAFT_DB_DATABASE="craft3beta"
+DB_DATABASE="craft3beta"
 
 # The database schema that will be used (PostgreSQL only)
-CRAFT_DB_SCHEMA="public"
+DB_SCHEMA="public"
 
 # The prefix that should be added to generated table names (only necessary if multiple things are sharing the same database)
-CRAFT_DB_TABLE_PREFIX=""
+DB_TABLE_PREFIX=""
 
 # The port to connect to the database with. Will default to 5432 for PostgreSQL and 3306 for MySQL.
-CRAFT_DB_PORT="5432"
+DB_PORT="5432"