add image readme

Author: mkuf

docker/laserweb4/README.md

@@ -1,6 +1,51 @@
 This Image is built and used by [prind](.).
 
 # Laserweb4 packaged in Docker
-Frontend only
+## What is Laserweb?
 
-WIP.
+> LaserWeb / CNCWeb is a full CAM & Machine Control Program for Laser/CNC/Plotter/Plasma applications.
+_via https://laserweb.yurl.ch/_
+
+This image contains the frontend from https://github.com/ssendev/LaserWeb4.  
+It still requires a compatible backend like [moonraker](https://github.com/Arksine/moonraker) or the [lw.comm-server](https://github.com/LaserWeb/lw.comm-server) if machine control is desired.
+
+## Usage
+#### Run
+```bash
+docker run -p 80:80 mkuf/laserweb:latest
+```
+#### Compose
+```yaml
+services:
+  laserweb:
+    image: mkuf/laserweb:latest
+    ports:
+      - "80:80"
+```
+## Defaults
+|Entity|Description|
+|---|---|
+|User| `nginx (101:101)` |
+|Workdir||
+|Entrypoint|`/docker-entrypoint.sh`|
+|Cmd|`nginx -g daemon off;`|
+
+## Ports
+|Port|Description|
+|---|---|
+|`80/tcp`|Default HTTP Port|
+
+## Volumes
+none
+
+## Tags
+|Tag|Description|Static|
+|---|---|---|
+|`latest`|Refers to the most recent runtime Image.|May point to a new build within 24h, depending on code changes in the upstream repository.|
+|`<git description>` <br>eg: `v4.1-1-g3c7564d`|Refers to a specific git description in the upstream repository. |Yes|
+
+## Targets
+|Target|Description|Pushed|
+|---|---|---|
+|`build`|Pull Upstream Codebase and build application|No|
+|`run`|Default runtime Image based on `library/nginx`|Yes|