diff --git a/ADVANCED.rst b/ADVANCED.rst
index e94bae53a..c1c7f7289 100644
--- a/ADVANCED.rst
+++ b/ADVANCED.rst
@@ -4,10 +4,10 @@ Advanced configuration
 Docker Swarm Mode
 -----------------
 
-OpenSlides may also be deployed in Swarm mode.  Distributing instances over
+OpenSlides may also be deployed in Swarm mode. Distributing instances over
 multiple nodes may increase performance and offer failure resistance.
 
-An example configuration file, ``docker-stack.yml.m4``, is provided.  Unlike
+An example configuration file, ``docker-stack.yml.m4``, is provided. Unlike
 the Docker Compose setup, this configuration will most likely need to be
 customized, especially its placement constraints and database-related
 preferences.
@@ -37,14 +37,14 @@ please familiarize yourself with `repmgr <https://repmgr.org/>`_.
 Backups
 -------
 
-All important data is stored in the database.  Additionally, the project
+All important data is stored in the database. Additionally, the project
 directory should be included in backups to ensure a smooth recovery.
 
 The primary database usually runs in the ``pgnode1`` service (but see `Database
 Configuration`_ above).
 
 In some cases, it may be sufficient to generate SQL dumps with ``pg_dump``
-through ``docker exec`` to create backups.  However, for proper incremental
+through ``docker exec`` to create backups. However, for proper incremental
 backups, the host system can backup the cluster's data directory and WAL
 archives.
 
diff --git a/DEVELOPMENT.rst b/DEVELOPMENT.rst
index 547cafe40..a3a939623 100644
--- a/DEVELOPMENT.rst
+++ b/DEVELOPMENT.rst
@@ -3,21 +3,21 @@
 ========================
 
 Check requirements
-'''''''''''''''''''''
+''''''''''''''''''
 
 - ``docker``
 - ``docker-compose``
 - ``git``
 - ``make``
 
-**Note about migrating from development
-setups before version 3.4**: You must set the ``OPENSLIDES_USER_DATA_DIR`` variable in
-your ``server/personal_data/var/settings.py`` to  ``'/app/personal_data/var'``. Another
-way is to just delete this file. It is recreated with the right paths afterwards.
+**Note about migrating from development setups before version 3.4**: You must set the
+``OPENSLIDES_USER_DATA_DIR`` variable in your ``server/personal_data/var/settings.py``
+to  ``'/app/personal_data/var'``. Another way is to just delete this file. It is
+recreated with the right paths afterwards.
 
 
 Get OpenSlides source code
-'''''''''''''''''''''''''''''
+''''''''''''''''''''''''''
 
 Clone current master version from `OpenSlides GitHub repository
 <https://github.com/OpenSlides/OpenSlides/>`_::
@@ -30,7 +30,8 @@ When updating the repository, submodules must be updated explicitly, too::
     git submodule update
 
 Start the development setup
-''''''''''''''''''''''''''''''
+'''''''''''''''''''''''''''
+
 Use `make` to start the setup::
 
     make run-dev
@@ -41,11 +42,14 @@ To stop the setup press Ctrl+C. To clean up the docker containers run::
     make stop-dev
 
 Running the test cases
-'''''''''''''''''''''''
+''''''''''''''''''''''
+
 For all services in submodules check out the documentation there.
 
+
 Server tests and scripts
--------------------------
+------------------------
+
 You need to have python (>=3.8) and python-venv installed. Change your workdirectory to the server::
 
     cd server
@@ -69,7 +73,8 @@ To deactivate it type ``deactivate``. Running all tests and linters::
     pytest tests/
 
 Client tests
--------------
+------------
+
 You need `node` and `npm` installed. Change to the client's directory. For the first time, install all dependencies::
 
     cd client/
diff --git a/LICENSE b/LICENSE
index 8213f33c7..75c547bde 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2011-2019 Authors of OpenSlides, see AUTHORS
+Copyright (c) 2011-2021 Authors of OpenSlides, see AUTHORS
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/README.rst b/README.rst
index 6c56ca192..3aac2f9e4 100644
--- a/README.rst
+++ b/README.rst
@@ -9,19 +9,22 @@ OpenSlides is a free, web-based presentation and assembly system for
 managing and projecting agenda, motions, and elections of assemblies. See
 https://openslides.com for more information.
 
+
 Installation
 ============
 
-The main deployment method is using Docker and Docker Compose. You only need to
-have these tools installed and no further dependencies. If you want a simpler
+The main deployment method is using Git, Docker and Docker Compose. You only need
+to have these tools installed and no further dependencies. If you want a simpler
 setup or are interested in developing, please refer to `development
-instructions
-<DEVELOPMENT.rst>`_.
+instructions <DEVELOPMENT.rst>`_.
+
+Get OpenSlides
+--------------
 
 First, you have to clone this repository::
 
     git clone https://github.com/OpenSlides/OpenSlides.git --recurse-submodules
-    cd OpenSlides/docker/
+    cd OpenSlides/
 
 **Note about migrating from version 3.3 or earlier**: With OpenSlides 3.4 submodules
 and a Docker setup were introduced. If you ran into problems try to delete your
@@ -30,8 +33,17 @@ first and initialize all submodules::
 
     git submodule update --init
 
-You need to build the Docker images for the client and server with this
-script::
+Setup Docker images
+-------------------
+
+You need to build the Docker images for the client and server and have to setup some
+configuration.
+
+First go to ``docker`` subdirectory::
+
+    cd docker
+
+Then build all images with this script::
 
     ./build.sh all
 
@@ -41,50 +53,56 @@ You must define a Django secret key in ``secrets/django.env``, for example::
       "$(tr -dc 'a-zA-Z0-9' < /dev/urandom | head -c 64)" > secrets/django.env
 
 We also strongly recommend that you set a secure admin password but it is not
-strictly required.  If you do not set an admin password, the default login
-credentials will be displayed on the login page.  Setting the admin password::
+strictly required. If you do not set an admin password, the default login
+credentials will be displayed on the login page. Setting the admin password::
 
     cp secrets/adminsecret.env.example secrets/adminsecret.env
     vi secrets/adminsecret.env
 
 Afterwards, generate the configuration file::
 
-    EXTERNAL_HTTP_PORT=8000 m4 docker-compose.yml.m4 > docker-compose.yml
+    m4 docker-compose.yml.m4 > docker-compose.yml
 
 Finally, you can start the instance using ``docker-compose``::
 
     docker-compose up
-    # or:
+
+OpenSlides runs on https://localhost:8000/.
+
+Use can also use daemonized instance::
+
     docker-compose up -d
     docker-compose logs
-    # ...
     docker-compose down
 
+
 More settings
 -------------
 
 When generating the ``docker-compose.yml``, more settings can be adjusted in the
 ``docker/.env`` file. All changes for the backend are passed into djangos ``settings.py``.
-You can find more information about most settings `here
-<server/SETTINGS.rst>`_. To generate
-the ``docker-compose.yml`` use this command::
+You can find more information about most settings in the `settings documentation
+<server/SETTINGS.rst>`_. To generate the ``docker-compose.yml`` use this command::
 
-    ( set -a; source .env; m4 docker-stack.yml.m4 ) > docker-stack.yml
+    cd docker
+    ( set -a; source .env; m4 docker-compose.yml.m4 ) > docker-compose.yml
 
 For an advanced database setup refer to the `advanced configuration 
 <ADVANCED.rst>`_.
 
+
 Bugs, features and development
 ================================
 
 Feel free to open issues here on GitHub! Please use the right templates for
-bugs and features, and use them correctly. Pull requests are also welcome; for
+bugs and features, and use them correctly. Pull requests are also welcome. For
 a general overview of the development setup refer the `development instructions
 <DEVELOPMENT.rst>`_.
 
 For security relevant issues **do not** create public issues and refer to
 our `security policy <SECURITY.md>`_.
 
+
 Used software
 =============
 
@@ -95,6 +113,7 @@ OpenSlides uses the following projects or parts of them:
 
 * several JavaScript packages (see ``client/package.json``)
 
+
 License and authors
 ===================
 
diff --git a/docker/.env b/docker/.env
index f56a7978e..ef96ea053 100644
--- a/docker/.env
+++ b/docker/.env
@@ -63,6 +63,7 @@ POSTFIX_RELAYHOST=
 ENABLE_SAML=
 ENABLE_ELECTRONIC_VOTING=
 DEMO_USERS=
+
 # Connections
 AUTOUPDATE_DELAY=
 CONNECTION_POOL_LIMIT=
@@ -87,6 +88,7 @@ REDIS_PORT=
 REDIS_SLAVE_HOST=
 REDIS_SLAVE_PORT=
 REDIS_SLAVE_WAIT_TIMEOUT=
+
 # Logging
 DJANGO_LOG_LEVEL=
 OPENSLIDES_LOG_LEVEL=