Add README and LICENSE files

README.md

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+# Asynqmon
+
+Asynqmon is a web based tool for monitoring and administrating Asynq queues and tasks.
+
+## Installation
+
+### Release binaries
+
+You can download the release binary for your system from the
+[releases page](https://github.com/hibiken/asynqmon/releases).
+
+### Building from source
+
+To build Asynqmon from source code, first ensure that have a working
+Go environment with [version 1.16 or greater installed](https://golang.org/doc/install).
+You also need [Node.js](https://nodejs.org/) and [Yarn](https://yarnpkg.com/)
+installed in order to build the frontend assets.
+
+Download the source code and then run:
+
+```sh
+$ make build
+```
+
+The `asynqmon` binary should be created in the current directory.
+
+## Usage
+
+To start the server, run
+
+```sh
+$ asynqmon
+```
+
+Pass flags to specify port, redis server address, etc.
+
+```sh
+$ asynqmon --port=3000 --redis_addr=localhost:6380
+```
+
+## License
+
+Asynqmon is released under the MIT license. See [LICENSE](https://github.com/hibiken/asynqmon/blob/master/LICENSE).