IPFS Integration: add README to web

aqua-examples/aqua-ipfs-integration/web/README.md

@@ -1,2 +1,26 @@
-# Getting Started with Fluence
+# IPFS Compute Web Demo
 
+It's possible to implement any kind of computations on top of IPFS with Fluence. In this demo, we use a simple example that calculates size of a file. It's easily extendable to any kind of file processing or manipulation.
+
+## Connect to the Fluence Network
+
+You're presented with 3 random relays, connect to any of them.
+
+![connect](/readme/ipfs_comp_web_1.png)
+
+## Deploy a service from IPFS
+You will download `process_files.wasm` from IPFS network to a Fluence node, and deploy it.
+
+![deploy](/readme/ipfs_comp_web_2.png)
+
+## Call a function on the deployed service
+
+You've just deployed [ProcessFiles](/aqua/src/process_files.aqua) service. It allows you to query file size of a file downloaded from IPFS. Enter IPFS CID, and press `get size` button.
+
+![get file size](/readme/ipfs_comp_web_3.png)
+
+## Observe the result
+
+File size has been calculated, you can see it at the bottom of the web page.
+
+![observe file size](/readme/ipfs_comp_web_4.png)