Openproject won't start after I did docker-compose pull && docker-compose up -d web and worker processes are starting and exiting again and again.

This is my docker-compose.yml:

version: '3.4'

services:
  [...]
  openproject:
    image: openproject/community:8
    container_name: openproject
    restart: always
    environment:
      - SECRET_KEY_BASE=[...]
    ports:
      - 8080:80
    volumes:
      - /var/openproject/pgdata:/var/lib/postgresql/9.6/main
      - /var/openproject/logs:/var/log/supervisor
      - /var/openproject/static:/var/db/openproject
  [...]

Output from the docker container:

-----> Database cluster already exists, not modifying.
       Starting PostgreSQL 9.6 database server: main.
       /usr/src/app /usr/src/app
       /usr/src/app
       Trying to contact PostgreSQL server instance or waiting for it to come online.
       /usr/src/app /usr/src/app
       Starting memcached: memcached.
       [auth_saml] Missing settings from '/usr/src/app/config/plugins/auth_saml/settings.yml', skipping omniauth registration.
       hook registered
       Migrating to AddLdapSynchronizedGroups (20180125082205)
       == 20180125082205 AddLdapSynchronizedGroups: migrating ========================
       -- adapter_name()
          -> 0.0000s
       -- adapter_name()
          -> 0.0000s
       -- adapter_name()
          -> 0.0000s
       -- create_table(:ldap_groups_synchronized_groups, {:id=>:integer})
          -> 0.0872s
       -- adapter_name()
          -> 0.0000s
       -- adapter_name()
          -> 0.0000s
       -- adapter_name()
          -> 0.0000s
       -- create_table(:ldap_groups_memberships, {:id=>:integer})
          -> 0.0263s
       == 20180125082205 AddLdapSynchronizedGroups: migrated (0.1145s) ===============

       Migrating to CreateDoorkeeperTables (20181112125034)
       == 20181112125034 CreateDoorkeeperTables: migrating ===========================
       -- adapter_name()
          -> 0.0002s
       -- create_table(:oauth_applications, {})
          -> 0.0211s
       -- add_foreign_key(:oauth_applications, :users, {:column=>:owner_id, :on_delete=>:nullify})
          -> 0.0221s
       -- add_foreign_key(:oauth_applications, :users, {:column=>:client_credentials_user_id, :on_delete=>:nullify})
          -> 0.0049s
       -- add_index(:oauth_applications, :uid, {:unique=>true})
          -> 0.0109s
       -- add_index(:oauth_applications, [:owner_id, :owner_type])
          -> 0.0123s
       -- adapter_name()
          -> 0.0000s
       -- create_table(:oauth_access_grants, {})
          -> 0.0391s
       -- add_index(:oauth_access_grants, :token, {:unique=>true})
          -> 0.0089s
       -- add_foreign_key(:oauth_access_grants, :oauth_applications, {:column=>:application_id})
          -> 0.0080s
       -- adapter_name()
          -> 0.0000s
       -- create_table(:oauth_access_tokens, {})
          -> 0.1447s
       -- add_index(:oauth_access_tokens, :token, {:unique=>true})
          -> 0.0126s
       -- add_index(:oauth_access_tokens, :refresh_token, {:unique=>true})
          -> 0.0174s
       -- add_foreign_key(:oauth_access_tokens, :oauth_applications, {:column=>:application_id})
          -> 0.0073s
       -- add_column(:oauth_access_grants, :code_challenge, :string, {:null=>true})
          -> 0.0021s
       -- add_column(:oauth_access_grants, :code_challenge_method, :string, {:null=>true})
          -> 0.0025s
       == 20181112125034 CreateDoorkeeperTables: migrated (0.3180s) ==================

       Migrating to CreateGrid (20181118193730)
       == 20181118193730 CreateGrid: migrating =======================================
       -- adapter_name()
          -> 0.0001s
       -- create_table(:grids, {})
          -> 0.0156s
       -- adapter_name()
          -> 0.0000s
       -- create_table(:grid_widgets, {})
          -> 0.0172s
       == 20181118193730 CreateGrid: migrated (0.0338s) ==============================

       Migrating to RemoveAccessibilityMode (20190124081710)
       == 20190124081710 RemoveAccessibilityMode: migrating ==========================
       -- remove_column(:user_preferences, :impaired)
          -> 0.0052s
       -- delete("      DELETE FROM settings\n      WHERE name = 'accessibility_mode_for_anonymous'\n")
          -> 0.0024s
          -> 1 rows
       == 20190124081710 RemoveAccessibilityMode: migrated (0.0093s) =================

       Migrating to AddHiddenToQueries (20190207155607)
       == 20190207155607 AddHiddenToQueries: migrating ===============================
       -- add_column(:queries, :hidden, :boolean, {:default=>false})
          -> 0.0208s
       == 20190207155607 AddHiddenToQueries: migrated (0.0213s) ======================

       Migrating to MigrateMyPageLayout (20190220080647)
       == 20190220080647 MigrateMyPageLayout: migrating ==============================
       == 20190220080647 MigrateMyPageLayout: migrated (0.5837s) =====================

       Migrating to AddTlsModeToAuthSources (20190227163226)
       == 20190227163226 AddTlsModeToAuthSources: migrating ==========================
       -- add_column(:auth_sources, :tls_mode, :integer, {:default=>0, :null=>false})
          -> 0.0283s
       -- remove_column(:auth_sources, :tls, :boolean, {:default=>false, :null=>false})
          -> 0.0064s
       == 20190227163226 AddTlsModeToAuthSources: migrated (0.1793s) =================

       Migrating to RemoveHierarchyPaths (20190301122554)
       == 20190301122554 RemoveHierarchyPaths: migrating =============================
       ==  AddHierarchyPaths: reverting ==============================================
       -- drop_table(:hierarchy_paths, {:id=>:integer})
          -> 0.0058s
       ==  AddHierarchyPaths: reverted (0.0186s) =====================================

       == 20190301122554 RemoveHierarchyPaths: migrated (0.0494s) ====================

       *** Seeding for locale: 'en'
       *** Seeding basic data
        ↳ BuiltinRolesSeeder
          *** Skipping built in role Non member - already exists
          *** Skipping built in role Anonymous - already exists
        ↳ RoleSeeder
          *** Skipping roles as there are already some configured
        ↳ ActivitySeeder
          *** Skipping activities as there are already some configured
        ↳ ColorSeeder
          *** Skipping colors as there are already some configured
        ↳ ColorSchemeSeeder
          *** Skipping flat colors as there are already some configured
        ↳ WorkflowSeeder
          *** Skipping types, statuses and workflows as there are already some configured
        ↳ PrioritySeeder
          *** Skipping priorities as there are already some configured
        ↳ SettingSeeder
          Loading discovered seeders:
        ↳ SettingSeeder
          *** Skipping BasicData::Backlogs::SettingSeeder
        ↳ EnumerationsSeeder
       *** Seeding admin user
          *** No need to seed an admin as there already is one.
       *** Seeding demo data
        ↳ ProjectSeeder
          *** Skipping DemoData::ProjectSeeder
          Loading discovered seeders:
        ↳ MyProjectsOverviewSeeder
          *** Skipping DemoData::MyProjectPage::MyProjectsOverviewSeeder
       *** Loading action_view_railtie seed data
       *** Loading active_storage seed data
       *** Loading action_cable_engine seed data
       *** Loading doorkeeper_engine seed data
       *** Loading typed_dag_engine seed data
       *** Loading date_validator_engine seed data
       *** Loading ok_computer seed data
       *** Loading bourbon_engine seed data
       *** Loading i18n_js_engine seed data
       *** Loading openproject_translations seed data
       *** Loading health_check_engine seed data
       *** Loading openproject_global_roles seed data
       *** Loading openproject_auth_plugins seed data
       *** Loading openproject_auth_saml seed data
       *** Loading openproject_openid_connect seed data
       *** Loading openproject_documents seed data
       *** Loading openproject_my_project_page seed data
       *** Loading openproject_xls_export seed data
       *** Loading reportingengine seed data
       *** Loading openproject_costs seed data
       *** Loading openproject_reporting seed data
       *** Loading openproject_meeting seed data
       *** Loading openproject_pdf_export seed data
       *** Loading openproject_backlogs seed data
       *** Loading openproject_avatars seed data
       *** Loading openproject_two_factor_authentication seed data
       *** Loading openproject_webhooks seed data
       *** Loading openproject_github_integration seed data
       *** Loading openproject_ldap_groups seed data
       *** Loading grids seed data
       Stopping memcached: memcached.
       /usr/src/app
       Stopping PostgreSQL 9.6 database server: main.
-----> Database setup finished.
       On first installation, the default admin credentials are login: admin, password: admin
-----> Launching supervisord...
/usr/lib/python2.7/dist-packages/supervisor/options.py:298: UserWarning: Supervisord is running as root and it is searching for its configuration file in default locations (including its current working directory); you probably want to specify a "-c" argument specifying an absolute path to a configuration file for improved security.
  'Supervisord is running as root and it is searching '
2019-03-07 11:51:12,266 CRIT Supervisor running as root (no user in config file)
2019-03-07 11:51:12,267 INFO Included extra file "/etc/supervisor/conf.d/supervisord.conf" during parsing
2019-03-07 11:51:12,287 INFO RPC interface 'supervisor' initialized
2019-03-07 11:51:12,288 CRIT Server 'unix_http_server' running without any HTTP authentication checking
2019-03-07 11:51:12,288 INFO supervisord started with pid 1
2019-03-07 11:51:13,293 INFO spawned: 'postgres' with pid 98
2019-03-07 11:51:13,299 INFO spawned: 'apache2' with pid 99
2019-03-07 11:51:13,304 INFO spawned: 'web' with pid 100
2019-03-07 11:51:13,308 INFO spawned: 'worker' with pid 101
2019-03-07 11:51:13,326 INFO spawned: 'postfix' with pid 102
2019-03-07 11:51:13,337 INFO spawned: 'cron' with pid 104
2019-03-07 11:51:13,344 INFO spawned: 'memcached' with pid 105
2019-03-07 11:51:13,379 INFO success: postfix entered RUNNING state, process has stayed up for > than 0 seconds (startsecs)
2019-03-07 11:51:14,565 INFO success: postgres entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
2019-03-07 11:51:14,575 INFO success: apache2 entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
2019-03-07 11:51:14,575 INFO success: web entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
2019-03-07 11:51:14,576 INFO success: worker entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
2019-03-07 11:51:14,576 INFO success: cron entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
2019-03-07 11:51:14,576 INFO success: memcached entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
2019-03-07 11:51:15,056 INFO exited: postfix (exit status 0; expected)
2019-03-07 11:51:19,886 INFO exited: worker (exit status 1; not expected)
2019-03-07 11:51:20,106 INFO spawned: 'worker' with pid 347
2019-03-07 11:51:20,211 INFO exited: web (exit status 1; not expected)
2019-03-07 11:51:20,360 INFO spawned: 'web' with pid 352
2019-03-07 11:51:21,851 INFO success: web entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
2019-03-07 11:51:21,851 INFO success: worker entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
2019-03-07 11:51:22,383 INFO exited: web (exit status 1; not expected)
2019-03-07 11:51:23,388 INFO spawned: 'web' with pid 366
2019-03-07 11:51:24,551 INFO success: web entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)
2019-03-07 11:51:24,568 INFO exited: worker (exit status 1; not expected)

excerpt from web-stderr.log:

nginx: [alert] The 'passenger_analytics_log_user' directive is obsolete and doesn't do anything anymore. in /tmp/passenger-standalone.vvmm0n/nginx.conf:58
nginx: [alert] Cannot stat '/root/.passenger/support-binaries/6.0.1/PassengerAgent': Permission denied (errno=13) (13: Permission denied)
`/root` is not writable.
Bundler will use `/tmp/bundler/home/unknown' as your home directory temporarily.```