Add hints

.env

@@ -3,15 +3,15 @@ COMPOSE_PROJECT_NAME=ghostfolio-development
 # CACHE
 REDIS_HOST=localhost
 REDIS_PORT=6379
-REDIS_PASSWORD=password
+REDIS_PASSWORD=<INSERT_REDIS_PASSWORD>
 
 # POSTGRES
 POSTGRES_DB=ghostfolio-db
 POSTGRES_USER=user
-POSTGRES_PASSWORD=password
+POSTGRES_PASSWORD=<INSERT_POSTGRES_PASSWORD>
 
-ACCESS_TOKEN_SALT=GHOSTFOLIO
+ACCESS_TOKEN_SALT=<INSERT_RANDOM_STRING>
 ALPHA_VANTAGE_API_KEY=
 DATABASE_URL=postgresql://${POSTGRES_USER}:${POSTGRES_PASSWORD}@localhost:5432/${POSTGRES_DB}?sslmode=prefer
-JWT_SECRET_KEY=123456
+JWT_SECRET_KEY=<INSERT_RANDOM_STRING>
 PORT=3333