Updated website docs and /twenty-server/.env (#8801)

Fix for the issue Incorrect Database Connection String in .env File
#8741

---------

Co-authored-by: Félix Malfait <felix@twenty.com>

Makefile

@@ -2,17 +2,17 @@ postgres-on-docker:
 	docker run -d \
 	--name twenty_pg \
 	-e PGUSER_SUPERUSER=postgres \
-	-e PGPASSWORD_SUPERUSER=twenty \
+	-e PGPASSWORD_SUPERUSER=postgres \
 	-e ALLOW_NOSSL=true \
 	-v twenty_db_data:/home/postgres/pgdata \
 	-p 5432:5432 \
 	twentycrm/twenty-postgres-spilo:latest
 	@echo "Waiting for PostgreSQL to be ready..."
-	@until PGPASSWORD=twenty psql -h localhost -p 5432 -U postgres -d postgres \
+	@until PGPASSWORD=postgres psql -h localhost -p 5432 -U postgres -d postgres \
 		-c 'SELECT pg_is_in_recovery();' 2>/dev/null | grep -q 'f'; do \
 		sleep 1; \
 	done
-	PGPASSWORD=twenty psql -h localhost -p 5432 -U postgres -d postgres \
+	PGPASSWORD=postgres psql -h localhost -p 5432 -U postgres -d postgres \
 		-c "CREATE DATABASE \"default\" WITH OWNER postgres;" \
 		-c "CREATE DATABASE \"test\" WITH OWNER postgres;"