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Install and configure Docker CE:
```
curl -fsSL https://get.docker.com -o get-docker.sh
sudo sh get-docker.sh
sudo usermod -aG docker $(whoami)
docker login
```
If you prefer to perform these steps manually:
- https://docs.docker.com/install/linux/docker-ce/ubuntu/
- https://docs.docker.com/install/linux/linux-postinstall/
Add dockerhost as an alias for 127.0.0.1 for use by various Mattermost build scripts:
- Edit /etc/hosts file as an administrator (e.g. sudo) and add the following line:
```
127.0.0.1    dockerhost
```

Install Go:

sudo apt-get install -y build-essential
wget https://storage.googleapis.com/golang/go1.12.linux-amd64.tar.gz
sudo tar -C /usr/local -xzf go1.12.linux-amd64.tar.gz

Update your shell’s initialization script (e.g. .bashrc or .zshrc) and add the following:

export GOPATH=$HOME/go
export PATH=$PATH:$GOPATH/bin
export PATH=$PATH:/usr/local/go/bin

Edit /etc/security/limits.conf as an administrator (e.g. sudo) and add the following lines, replacing {username} with your username:
```
{username}  soft  nofile  8096
{username}  hard  nofile  8096
```
Logout and login to effect the changes above.
Fork https://github.com/mattermost/mattermost-server

Clone the Mattermost source code from your fork:

export GITHUB_USERNAME=my_username
mkdir -p $(go env GOPATH)/src/github.com/mattermost
git clone https://github.com/$GITHUB_USERNAME/mattermost-server.git $(go env GOPATH)/src/github.com/mattermost/mattermost-server

Start the server and test your environment:

cd $(go env GOPATH)/src/github.com/mattermost/mattermost-server
make run-server
curl http://localhost:8065/api/v4/system/ping
make stop-server

If successful, the curl step will return a JSON object:

{"AndroidLatestVersion":"","AndroidMinVersion":"","DesktopLatestVersion":"","DesktopMinVersion":"","IosLatestVersion":"","IosMinVersion":"","status":"OK"}

Note: Browsing directly to http://localhost:8065/ will display a 404 Not Found until the web app is configured. See Web App Developer Setup and Mobile App Developer Setup for additional setup.