Move password related env variables to docker compose .env file

.env

@@ -1,5 +1,7 @@
 COMPOSE_FILE=docker-compose.dev.yml
 COMPOSE_PROJECT_NAME=candymat
 
-#Postgraphile vars
+# Backend vars
+POSTGRES_PASSWORD=postgres!dev
 DATABASE_URL=postgres://candymat_postgraphile:postgres!dev@postgres:5432/candymat_db
+JWT_SECRET=asdfasdfasdf

backend/backend.env

@@ -1,8 +1,5 @@
 # Postgres database setup
-POSTGRES_PASSWORD=postgres!dev
 POSTGRES_USER=candymat_postgraphile
+# Password is handled by docker-compose
 POSTGRES_DB=candymat_db
 POSTGRES_SCHEMA=candymat_data
-
-# postgraphile setup
-JWT_SECRET=asdfasdfasdf

docker-compose.dev.yml

@@ -28,6 +28,8 @@ services:
     build:
       dockerfile: ./Dockerfile
       context: ./backend/
+    environment:
+      - "POSTGRES_PASSWORD=${POSTGRES_PASSWORD}"
     env_file: ./backend/backend.env
     ports:
       - "5432:5432"