Added README

Author: tcpipuk

README.md

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+# DummyBridge
+
+[![Go Reference](https://pkg.go.dev/badge/github.com/beeper/dummybridge.svg)](https://pkg.go.dev/github.com/beeper/dummybridge)
+[![Go Report Card](https://goreportcard.com/badge/github.com/beeper/dummybridge)](https://goreportcard.com/report/github.com/beeper/dummybridge)
+[![Build Docker](https://github.com/beeper/dummybridge/actions/workflows/docker.yaml/badge.svg?branch=main)](https://github.com/beeper/dummybridge/actions/workflows/docker.yaml)
+
+DummyBridge is a Go-based bridge designed for testing purposes. It provides an echo bridge
+functionality and supports various login flows, including password, cookies, local storage,
+and display-and-wait.
+
+## Features
+
+- **Echo Bridge Functionality**: Acts as a simple echo bridge for testing.
+- **Login Flows**: Supports multiple login flows such as password, cookies, local storage,
+  and display-and-wait.
+- **Automation**: Configurable automation options for management rooms, login, portals,
+  and backfill.
+
+## Docker Images
+
+To install Docker, refer to the [Docker Engine install guide](https://docs.docker.com/engine/install/).
+
+The DummyBridge project provides several Docker images:
+
+- `ghcr.io/beeper/dummybridge:latest`: The main DummyBridge application.
+- `ghcr.io/beeper/dummybridge/loginhelper:latest`: A helper service for managing login flows.
+- `ghcr.io/beeper/dummybridge/go:latest`: A base image for Go applications.
+
+To pull the latest version of the image, use the following:
+
+```sh
+docker pull ghcr.io/beeper/dummybridge:latest
+```
+
+## Configuration
+
+DummyBridge can be configured using a YAML file. Below is an example configuration:
+
+```yaml
+automation:
+  open_management_room: false # Open a management room for admins.
+  login: false # Automatically log in admins.
+  portals:
+    count: 0 # Number of portals to create during startup.
+    members: 0 # Number of members initially in each portal.
+    messages: 0 # Number of messages initially sent to each portal.
+  backfill:
+    timelimit: 0s # Duration for the initial startup infinite backfill, e.g. 10s, 1m, 1h
+```
+
+## Running
+
+To run DummyBridge using Docker, execute the following command:
+
+```sh
+docker run -d --name dummybridge -v /path/to/config.yaml:/etc/dummybridge/config.yaml ghcr.io/beeper/dummybridge:latest
+```
+
+Replace `/path/to/config.yaml` with the path to your configuration file.
+
+## Login Flows
+
+Once DummyBridge is launched, you can interact with it using various login flows:
+
+1. **Password Login**:
+   - Navigate to the login page and enter any username and password.
+     These credentials are used as the ID.
+
+2. **Cookies Login**:
+   - Visit the `/pages/cookies.html` page and enter your username and password.
+     These will be saved as cookies.
+
+3. **Local Storage Login**:
+   - Visit the `/pages/localstorage.html` page and enter your username and password.
+     These will be saved in local storage.
+
+4. **Display and Wait Login**:
+   - A code will be generated, which you need to enter on the `/pages/daw_submit.html` page.
+
+DummyBridge supports several commands for testing purposes, such as creating new rooms,
+generating ghosts, and sending messages. These commands can be executed within the bridge's
+management room.
+
+## License
+
+This project currently does not have a published license.