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README.md

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+# Mattermost Docker setup
+
+This repository is meant to replace the previous *mattermost-docker* repository and tries to stay as close as possible
+to the old one. Migrating will include some steps and while trying to keep it simple the structure changed. To keep it
+simple all the basic configuration can be done through the *.env* file.
+
+## Prequisites
+1. A Docker installation is needed (https://docs.docker.com/engine/install/)
+2. Docker-compose needs to be >= 1.28 (https://docs.docker.com/compose/install/)
+
+## Quick setup
+These steps are required for new Mattermost setups and don't include everything needed when already using
+*mattermost-docker*.
+
+### 1. Cloning the repository (as an alternative please download it as archive)
+```
+$ git pull https://github.com/mattermost/docker
+$ cd docker
+```
+
+### 2. Create a *.env* file by copying and adjusting the example file
+```
+$ cp env.example .env
+```
+
+### 3. Create the needed directores and set permissions (this orientates on the previous *mattermost-docker* structure and the
+   direcories can be changed in the *.env* file)
+
+```
+$ mkdir -p ./volumes/app/mattermost/{config,data,logs,plugins,client-plugins}
+$ sudo chown -R 2000:2000 ./volumes/app/mattermost
+
+## when using the provided nginx and if a certificate and key already exists
+$ mkdir -p ./volumes/web/cert
+```
+
+### 4. Placing the certificate and key (if using provided nginx)
+#### 4.1 Pre-existing certificate and key
+```
+$ cp PATH-TO-CERT.PEM ./volumes/web/cert/cert.pem
+$ cp PATH-TO-KEY.PEM ./volumes/web/cert/key-no-password.pem
+```
+#### 4.2 Let's Encrypt
+**TODO: add link to Let's Encrypt certificate guide**
+
+For using Let's Encrypt you can follow this guide LINK or use the this Bash script scripts/issue-certificate.sh. Both
+methods requires you to change the path to the Let's Encrypt config folders inside the *.env*.
+```
+$ bash scripts/issue-certificate.sh -d mm.example.com -o ./certs
+```
+
+### 5. Run `docker-compose`
+#### 5.1 Default (with nginx)
+```
+$ sudo docker-compose -f docker-compose.yml -f docker-compose.nginx.yml up -d
+```
+
+#### 5.2. Without nginx (for use behind an existing reverse proxy)
+```
+$ sudo docker-compose -f docker-compose.yml -f docker-compose.without-nginx.yml up -d
+```