Add e2e testing setup (#163)

* Setup e2e testing

* Add user e2e tests

* Rename database host env variable to DB_HOST

* Force push (try to recover DB_HOST env)

* Rename db host env variable to `DB_HOSTNAME`

* Remove unnecessary `initDb` from test-utils

The current database.config is running the migrations:
`migrationsRun: true`

server/src/config/database.config.ts

@@ -2,7 +2,7 @@ import { TypeOrmModuleOptions } from '@nestjs/typeorm';
 
 export const databaseConfig: TypeOrmModuleOptions = {
   type: 'postgres',
-  host: 'immich_postgres',
+  host: process.env.DB_HOSTNAME || 'immich_postgres',
   port: 5432,
   username: process.env.DB_USERNAME,
   password: process.env.DB_PASSWORD,