feat(cli): run migrations and app in start command (#284)

* feat: perform pending migrations in start command

* feat: log error when DB connection is refused

* feat: log error when Redis connection is refused

* refactor: fix type errors

* fix: correct server and copy graphql schema

* fix: differentiate migrations by env

* chore: remove dev executable

* chore: fix typo in default postgresUsername

* fix: copy json files into dist folder

* chore(cli): add dev script

* chore: pull non-dev logs to info level

* feat(cli): run app in start command

* fix(backend): remove default count in Connection

* fix(cli): remove .eslintrc usage in lint script

* refactor: remove disableMigrationsListValidation

* refactor: make Step optional in ExecutionStep

* refactor: make Flow optional in Step

packages/backend/src/graphql/queries/get-data.ts

@@ -12,8 +12,12 @@ const getData = async (_parent: unknown, params: Params, context: Context) => {
     .withGraphFetched('connection')
     .findById(params.stepId);
 
+  if (!step) return null;
+
   const connection = step.connection;
 
+  if (!connection || !step.appKey) return null;
+
   const appData = App.findOneByKey(step.appKey);
   const AppClass = (await import(`../../apps/${step.appKey}`)).default;