Prepare release 0.1.0 (#3)

Author: actualwitch

README.md

@@ -1,6 +1,11 @@
 ![GitHub_headerImage](https://user-images.githubusercontent.com/3262610/221191767-73b8a8d9-9f8b-440e-8ab6-75cb3c82f2bc.png)
 
-This GitHub action allows you to instrument a pipeline and track number of runs and their duration; the data is then exported to a prometheus aggregation gateway, like [prom-aggregation-gateway](https://github.com/zapier/prom-aggregation-gateway).
+This GitHub action allows you to instrument a pipeline and track number of runs and their duration; the data is then exported to a prometheus aggregation gateway, such as one of these:
+
+- [Prometheus Pushgateway](https://github.com/prometheus/pushgateway)
+- [Gravel Gateway](https://github.com/sinkingpoint/prometheus-gravel-gateway/tree/master)
+- [Prometheus Aggregation Gateway](https://github.com/zapier/prom-aggregation-gateway)
+
 Due to limitations of GitHub actions, tracking success rate is only possible via api, so it is outside the scope of this action (for now).
 
 ## Usage
@@ -11,9 +16,10 @@ Just add the action as a step to your job, and provide the url of the prometheus
 steps:
   - uses: autometrics-dev/instrument-pipeline@v0
     with:
-      pushgateway: http://pushgateway.example.com/metrics
+      pushgateway: http://pushgateway.example.com
+      gatewaytype: prometheus
   - uses: actions/checkout@v3
-  - uses: actions/setup-node@v3
+  - uses: actions/setup-node@v4
     with:
       node-version: 20
   - run: npm install
@@ -26,7 +32,13 @@ Now every time the action runs, it will send the duration (and increase the run
 
 ### `pushgateway`
 
-**Required** The url of the prometheus aggregation gateway, with the `/metrics` endpoint.
+**Required** 
+
+URL to the aggregation gateway, for example `http://localhost:9091`.
+
+### `gatewaytype`
+
+Type of the aggregation gateway, one of `prometheus`, `gravel`, or `zapier`. Currently only changes the url format in case of prometheus.
 
 ### `buckets`