Updates Readme content (#7)

#### 📖 Summary

<!-- Provide a summary of your changes. Describe the why and not how. -->

#### 📑 Test Plan

> 💡 Select your test plan for the code changes.

- [x] Tested via Drone.io pipeline
- [ ] Custom test
- [ ] No test plan

##### Details / Justification

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

#### 📚 Additional Notes

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Co-authored-by: OCram85 <marco.blessing@googlemail.com>
Reviewed-on: CodeServer/Container#7

Dockerfile

@@ -1,7 +1,7 @@
 FROM quay.io/linuxserver.io/code-server:4.8.3
 
 RUN \
-  echo "**** install starshipt prompt ****" && \
+  echo "**** install starship prompt ****" && \
   curl -sS https://starship.rs/install.sh | sh -s -- -f && \
   echo "eval \"\$(starship init bash)\"" >> /etc/bash.bashrc
 

README.md

@@ -13,19 +13,61 @@
 </p>
 
 <h1 align="center">
-  Container
+  Code-Server as Container 📦
 </h1>
 
 <p align="center">
-  
+ This project optimizes the Code-Server container image from linuxserver.io.
 </p>
 
 <p align="center">
-  <a href="https://drone.ocram85.com/CodeServer/Container">
-    <img src="https://drone.ocram85.com/api/badges/CodeServer/Container/status.svg" alt="Master Branch Build Status">
+  <a href="https://ci.ocram85.com/CodeServer/Container">
+    <img src="https://ci.ocram85.com/api/badges/CodeServer/Container/status.svg" alt="Master Branch Build Status">
   </a>
 </p>
 
 ## :book: General
 
-> :bulb: tbd...
+The container is based on the latest `linuxserver/code-server` image.
+
+### 🚀 Starship prompt
+
+The [Starship](starship.rs) prompt is added an enabled as default. Default config uses Emojis and FiraCode icons.
+
+### 🔱 git config
+
+Adds default system config with:
+
+- enabled plain credential store for remote.
+- enabled bash completion for git command.
+- added git log helper `lg1` + `lg2`
+
+> 💡 See [gitconfig-system](./gitconfig-system) for details.
+
+### 🧙 Added `install-devruntime` helper script
+
+Added `install-devruntime` to help installing common runtime in container.
+This helps reducing the image size.
+
+```
+install-devruntime is used to install optional runtimes for developing in a
+code-server container environment.
+
+Syntax: install-devruntime RUNTIME ...
+RUNTIME         [dotnet|golang|nodejs|powershell]
+  dotnet        Installs latest LTS dotnet core sdk + runtime.
+  golang        Installs golang 1.19.3.
+  nodejs        Installs latest NodeJs LTS version.
+  powershell    Installs latest PowerShell LTS version.
+-h              Prints this help messagee.
+disablemotd     Disables hint in new bash terminal
+setcode         Sets VS Code user setting with basic (Fira Code)
+
+Example 1: install-devruntime dotnet
+Example 2: install devruntime golang nodejs
+```
+
+## 💳 Credits
+
+- Photo by <a href="https://unsplash.com/@frankiefoto?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText">frank mckenna</a> on <a href="https://unsplash.com/s/photos/container?utm_source=unsplash&utm_medium=referral&utm_content=creditCopyText">Unsplash</a>
+