Merge pull request #4 from loftwah/master

Adding a snippet on how to install Docker-CE nix

Author: rickwest

source/snippets/dockerce-ubuntu.md

@@ -0,0 +1,32 @@
+extends: _layouts.documentation
+section: content
+title: Install Docker-CE on Ubuntu Linux 18.04
+description: A useful snippet that shows how to install Docker-CE on Ubuntu and also my first Open Source contribution!
+
+# Install Docker-CE on Ubuntu Linux 18.04 (should be the same for most current versions)
+
+```shell
+# Update the apt package list.
+sudo apt-get update -y
+# Install Docker's package dependencies.
+sudo apt-get install -y \
+    apt-transport-https \
+    ca-certificates \
+    curl \
+    software-properties-common
+# Download and add Docker's official public PGP key.
+curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
+# Verify the fingerprint.
+sudo apt-key fingerprint 0EBFCD88
+# Add the `stable` channel's Docker upstream repository.
+sudo add-apt-repository \
+   "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
+   $(lsb_release -cs) \
+   stable"
+# Update the apt package list (for the new apt repo).
+sudo apt-get update -y
+# Install the latest version of Docker CE.
+sudo apt-get install -y docker-ce
+# Allow your user to access the Docker CLI without needing root access.
+sudo usermod -aG docker $USER
+```