Add usage to readme

README.md

@@ -1,2 +1,42 @@
 # papa
 Papa: Amazing Python Analytics (in progress)
+
+## Web deployment
+
+Papa can be deployed as a web server using the provided Dockerfile.
+
+### Usage
+
+A live version with a web ui is available at http://papa.amfws.arg.tech/.
+
+The api endpoint is available at http://papa.amfws.arg.tech/api/all_analytics.
+It expects either an argument map, or an object containing an argument map
+alongside any of the three optional parameters that papa's all_analytics
+function takes, always in json format.
+
+Example:
+```bash
+curl --data '@18841.json' --header 'Content-Type: application/json' http://papa.amfws.arg.tech/api/all_analytics -o out.json
+```
+Note: The "@" on the beginning of the filename is not part of the filename, it's
+to tell curl that a filename is next.
+
+If you want to send arguments to the all_analytics function, it may be easier to use a programming language, such as Python.
+
+For an example in Python, add the args and the argument map to a dict, as shown on the
+`json=...` line.
+```py
+import requests
+import json
+
+with open("18841.json", "r") as f:
+    data = json.load(f)
+
+response = requests.post(
+    "http://papa.amfws.arg.tech/api/all_analytics",
+    json={"xaif": data, "node_level": True, "speaker": True, "forecast": True},
+)
+
+with open("out.json", "w") as f:
+    json.dump(response.json(), f)
+```