Document project

README.md

@@ -1,18 +1,41 @@
 # KafkaexLagExporter
 
-To start your Phoenix server:
+This project will collect Kafka consumer lag and provide them via Prometheus.
 
-  * Install dependencies with `mix deps.get`
-  * Start Phoenix endpoint with `mix phx.server` or inside IEx with `iex -S mix phx.server`
+## Start
 
-Now you can visit [`localhost:4000`](http://localhost:4000) from your browser.
+```bash
+docker run -ti --net="host" -e KAFKA_BROKERS=localhost:9093,localhost:9094,localhost:9095 lechindianer/kafkaex_lag_exporter:0.1
+```
 
-Ready to run in production? Please [check our deployment guides](https://hexdocs.pm/phoenix/deployment.html).
+Now you can check the exposed metrics at [localhost:4000](localhost:4000).
 
-## Learn more
+## Developing
 
-  * Official website: https://www.phoenixframework.org/
-  * Guides: https://hexdocs.pm/phoenix/overview.html
-  * Docs: https://hexdocs.pm/phoenix
-  * Forum: https://elixirforum.com/c/phoenix-forum
-  * Source: https://github.com/phoenixframework/phoenix
+To start the project locally:
+
+```bash
+KAFKA_BROKERS="localhost:9092" iex -S mix 
+```
+
+There is also a docker-compose file included which will start Kafka, serve Kowl (Web UI for Kafka) and start
+KafkaexLagExporter:
+
+```bash
+docker-compose up --build
+```
+
+Kowl is served at [localhost:8080](localhost:8080).
+
+### Tests
+
+```bash
+MIX_ENV=test mix test --no-test 
+
+# Don't forget to check credo for code violations:
+mix credo
+```
+
+## Links
+
+Source is on [Gitlab](https://gitlab.com/lechindianer/kafkaex-lag-exporter).