add docker-cli (#54)

#### 📖 Summary

- adds dockercli
- docker.sock must be mounted from hosts...

#### 📑 Test Plan

> 💡 Select your test plan for the code changes.

| Choice | Test Method       |
| :----: | :-----------      |
|   ✅   | CI pipeline tests |
|        | Custom test       |
|        | No test plan      |

##### Details / Justification

<!-- Add your test details or justification for missing tests here. -->

#### 📚 Additional Notes

- fixes #51

Co-authored-by: OCram85 <marco.blessing@googlemail.com>
Reviewed-on: #54

README.md

@@ -173,7 +173,8 @@ This helps reducing the image size.
   code-server container environment.
 
   Syntax: arkanum RUNTIME ...
-  RUNTIME         [dotnet|golang|nodejs|powershell]
+  RUNTIME         [docker-cli|dotnet|gitea|golang|nodejs|volta|powershell]
+    docker-cli    Installs the latest docker-ce cli.
     dotnet        Installs latest LTS dotnet core sdk + runtime.
     gitea         Installs gitea tools like the changelog generator.
     golang        Installs golang 1.19.3.

arkanum

@@ -8,7 +8,8 @@ function showHelp() {
   code-server container environment.
 
   Syntax: arkanum RUNTIME ...
-  RUNTIME         [dotnet|golang|nodejs|powershell]
+  RUNTIME         [docker-cli|dotnet|gitea|golang|nodejs|volta|powershell]
+    docker-cli           Installs the latest docker-cli.
     dotnet               Installs latest LTS dotnet core sdk + runtime.
     gitea                Installs gitea tools like the changelog generator.
     golang               Installs golang 1.19.3.
@@ -57,6 +58,26 @@ function sayW() {
   fi
 }
 
+function instDockerCLI() {
+  say "Installing docker-cli..." "docker-cli"
+  say "Getting requires packages..." "docker-cli"
+  sudo -E apt-get update > /dev/null
+  sudo -E apt-get install ca-certificates curl gnupg
+  say "Setting up docker repository..." "docker-cli"
+  sudo -E install -m 0755 -d /etc/apt/keyrings
+  curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo -E gpg --dearmor -o /etc/apt/keyrings/docker.gpg
+  sudo -E chmod a+r /etc/apt/keyrings/docker.gpg
+  echo \
+  "deb [arch="$(dpkg --print-architecture)" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
+  "$(. /etc/os-release && echo "$VERSION_CODENAME")" stable" | \
+  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
+  say "Installing docker-ce-cli package" "docker-cli"
+  sudo -E apt-get update > /dev/null
+  sudo -E apt-get install --no-install-recommends -y \
+    docker-ce-cli
+  say "docker-cli done." "docker-cli"
+}
+
 function instDotNet() {
   say "Installing dotnet requirements..." "dotnet"
   sudo -E apt-get update > /dev/null
@@ -227,6 +248,8 @@ function main() {
     if [[ "$1" == "-h" ]]; then
       showHelp
       exit 0
+    elif [[ "$i" == "docker-cli" ]]; then
+      instDockerCLI
     elif [[ "$i" == "dotnet" ]]; then
       instDotNet
     elif [[ "$i" == "golang" ]]; then

arkanum-completion

@@ -1,3 +1,3 @@
 #!/bin/bash
 
-complete -W "--disable-motd --install-extensions --reset-codesetting dotnet gitea golang nodejs volta powershell -h" arkanum
+complete -W "--disable-motd --install-extensions --reset-codesetting docker-cli dotnet gitea golang nodejs volta powershell -h" arkanum