add action for installing docker on ubuntu

README.md

@@ -40,7 +40,7 @@ Mouse control is also enabled, and the terminal mode is set to `screen-256color`
 
 Install [Docker for Windows](https://download.docker.com/win/stable/Docker%20for%20Windows%20Installer.exe). More details are available [here](https://docs.docker.com/docker-for-windows/install/).
 
-Install Docker in WSL, using the [Ubuntu instructions](https://docs.docker.com/install/linux/docker-ce/ubuntu/) (or another distro if applicable).
+Install Docker in WSL.
 
 Use the configuration script to set up `docker-relay` and to add your user to the `docker` group.
 

config.sh

@@ -9,11 +9,12 @@ while :; do
 	case "$ACTION_1" in
 		linux)
 			while :; do
-				ACTION_2="$(whiptail --menu '' 11 50 4 \
+				ACTION_2="$(whiptail --menu '' 12 50 5 \
 				2path 'Set up 2path.sh script' \
 				completion 'Set up user-specific ~/.bash_completion.d/' \
 				nodejs 'Install Node.js' \
 				nodejssetcap 'Let Node.js bind to privileged ports' \
+				docker 'Install Docker [Ubuntu]' \
 				--title 'Select Linux action' --notags --default-item "$ACTION_2" 3>&2 2>&1 1>&3-)"
 				case "$ACTION_2" in
 					2path)
@@ -41,6 +42,12 @@ while :; do
 						sudo setcap 'cap_net_bind_service+ep' $(which node) && \
 						whiptail --msgbox Done 7 10
 						;;
+					docker)
+						curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add - && \
+						sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" && \
+						sudo apt-get install docker-ce && \
+						whiptail --msgbox Done 7 10
+						;;
 					*)
 						break
 						;;
@@ -83,7 +90,7 @@ while :; do
 				ACTION_2="$(whiptail --menu '' 11 50 4 \
 				win 'Create ~/win symlink to %USERPROFILE%' \
 				hosts 'Create /etc/hosts symlink to system' \
-				docker 'Set up Docker WSL/Windows relay' \
+				docker 'Set up Docker WSL/Windows relay [Ubuntu]' \
 				windows 'Create Windows symlinks' \
 				--title 'Select WSL action' --notags --default-item "$ACTION_2" 3>&2 2>& 1>&3-)"
 				case "$ACTION_2" in