diff --git a/Makefile b/Makefile
index 0873758..6f6661b 100644
--- a/Makefile
+++ b/Makefile
@@ -31,4 +31,7 @@ ga:
 license-header:
 	update-license -path=./ -license=./HEADER
 
-.PHONY: indexer api generate test lint cover api-docs ga license-header
\ No newline at end of file
+build:
+	docker-compose up -d --build
+
+.PHONY: indexer api generate test lint cover api-docs ga license-header build
\ No newline at end of file
diff --git a/README.md b/README.md
index 687c90e..f840de1 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,22 @@
-# Astria Indexer
\ No newline at end of file
+# Astria Indexer
+
+## Standalone
+
+To run indexer clone repository, open directory containing project and run build command. Example:
+
+```bash
+git clone git@github.com:celenium-io/astria-indexer.git
+cd astria-indexer
+make build
+```
+
+or by docker compose
+
+
+```bash
+git clone git@github.com:celenium-io/astria-indexer.git
+cd astria-indexer
+docker-compose up -d --build
+```
+
+You can set environment variables for customizing instances and indexing logic. Example of environment file can be found [here](.env.example).
\ No newline at end of file
diff --git a/cmd/api/docs/docs.go b/cmd/api/docs/docs.go
index 3c838fa..4adcfe9 100644
--- a/cmd/api/docs/docs.go
+++ b/cmd/api/docs/docs.go
@@ -2011,7 +2011,7 @@ const docTemplate = `{
         },
         "/v1/ws": {
             "get": {
-                "description": "## Documentation for websocket API\n\n### Subscribe\n\nTo receive updates from websocket API send ` + "`" + `subscribe` + "`" + ` request to server.\n\n` + "`" + `` + "`" + `` + "`" + `json\n{\n    \"method\": \"subscribe\",\n    \"body\": {\n        \"channel\": \"\u003cCHANNEL_NAME\u003e\",\n        \"filters\": {\n            // pass channel filters\n        }\n    }\n}\n` + "`" + `` + "`" + `` + "`" + `\n\nNow 2 channels are supported:\n\n* ` + "`" + `head` + "`" + ` - receive information about indexer state update. Channel does not have any filters. Subscribe message should looks like:\n\n` + "`" + `` + "`" + `` + "`" + `json\n{\n    \"method\": \"subscribe\",\n    \"body\": {\n        \"channel\": \"head\"\n    }\n}\n` + "`" + `` + "`" + `` + "`" + `\n\nIn that channel messages of ` + "`" + `responses.State` + "`" + ` type will be sent.\n\n* ` + "`" + `blocks` + "`" + ` - receive information about new blocks. Channel does not have any filters. Subscribe message should looks like:\n\n` + "`" + `` + "`" + `` + "`" + `json\n{\n    \"method\": \"subscribe\",\n    \"body\": {\n        \"channel\": \"blocks\"\n    }\n}\n` + "`" + `` + "`" + `` + "`" + `\n\nIn that channel messages of ` + "`" + `responses.Block` + "`" + ` type will be sent.\n\n\n### Unsubscribe\n\nTo unsubscribe send ` + "`" + `unsubscribe` + "`" + ` message containing one of channel name describing above.\n\n\n` + "`" + `` + "`" + `` + "`" + `json\n{\n    \"method\": \"unsubscribe\",\n    \"body\": {\n        \"channel\": \"\u003cCHANNEL_NAME\u003e\",\n    }\n}\n` + "`" + `` + "`" + `` + "`" + `\n",
+                "description": "## Documentation for websocket API\n\n### Notification\n\nThe structure of notification is following in all channels:\n\n` + "`" + `` + "`" + `` + "`" + `json\n{\n    \"channel\": \"channel_name\",\n    \"body\": \"\u003cobject or array\u003e\"  // depends on channel\n}\n` + "`" + `` + "`" + `` + "`" + `\n\n### Subscribe\n\nTo receive updates from websocket API send ` + "`" + `subscribe` + "`" + ` request to server.\n\n` + "`" + `` + "`" + `` + "`" + `json\n{\n    \"method\": \"subscribe\",\n    \"body\": {\n        \"channel\": \"\u003cCHANNEL_NAME\u003e\",\n        \"filters\": {\n            // pass channel filters\n        }\n    }\n}\n` + "`" + `` + "`" + `` + "`" + `\n\nNow 2 channels are supported:\n\n* ` + "`" + `head` + "`" + ` - receive information about indexer state update. Channel does not have any filters. Subscribe message should looks like:\n\n` + "`" + `` + "`" + `` + "`" + `json\n{\n    \"method\": \"subscribe\",\n    \"body\": {\n        \"channel\": \"head\"\n    }\n}\n` + "`" + `` + "`" + `` + "`" + `\n\nNotification body of ` + "`" + `responses.State` + "`" + ` type will be sent to the channel.\n\n* ` + "`" + `blocks` + "`" + ` - receive information about new blocks. Channel does not have any filters. Subscribe message should looks like:\n\n` + "`" + `` + "`" + `` + "`" + `json\n{\n    \"method\": \"subscribe\",\n    \"body\": {\n        \"channel\": \"blocks\"\n    }\n}\n` + "`" + `` + "`" + `` + "`" + `\n\nNotification body of ` + "`" + `responses.Block` + "`" + ` type will be sent to the channel.\n\n\n### Unsubscribe\n\nTo unsubscribe send ` + "`" + `unsubscribe` + "`" + ` message containing one of channel name describing above.\n\n\n` + "`" + `` + "`" + `` + "`" + `json\n{\n    \"method\": \"unsubscribe\",\n    \"body\": {\n        \"channel\": \"\u003cCHANNEL_NAME\u003e\",\n    }\n}\n` + "`" + `` + "`" + `` + "`" + `\n",
                 "produces": [
                     "application/json"
                 ],
diff --git a/cmd/api/docs/swagger.json b/cmd/api/docs/swagger.json
index fb3fca6..37d437e 100644
--- a/cmd/api/docs/swagger.json
+++ b/cmd/api/docs/swagger.json
@@ -2001,7 +2001,7 @@
         },
         "/v1/ws": {
             "get": {
-                "description": "## Documentation for websocket API\n\n### Subscribe\n\nTo receive updates from websocket API send `subscribe` request to server.\n\n```json\n{\n    \"method\": \"subscribe\",\n    \"body\": {\n        \"channel\": \"\u003cCHANNEL_NAME\u003e\",\n        \"filters\": {\n            // pass channel filters\n        }\n    }\n}\n```\n\nNow 2 channels are supported:\n\n* `head` - receive information about indexer state update. Channel does not have any filters. Subscribe message should looks like:\n\n```json\n{\n    \"method\": \"subscribe\",\n    \"body\": {\n        \"channel\": \"head\"\n    }\n}\n```\n\nIn that channel messages of `responses.State` type will be sent.\n\n* `blocks` - receive information about new blocks. Channel does not have any filters. Subscribe message should looks like:\n\n```json\n{\n    \"method\": \"subscribe\",\n    \"body\": {\n        \"channel\": \"blocks\"\n    }\n}\n```\n\nIn that channel messages of `responses.Block` type will be sent.\n\n\n### Unsubscribe\n\nTo unsubscribe send `unsubscribe` message containing one of channel name describing above.\n\n\n```json\n{\n    \"method\": \"unsubscribe\",\n    \"body\": {\n        \"channel\": \"\u003cCHANNEL_NAME\u003e\",\n    }\n}\n```\n",
+                "description": "## Documentation for websocket API\n\n### Notification\n\nThe structure of notification is following in all channels:\n\n```json\n{\n    \"channel\": \"channel_name\",\n    \"body\": \"\u003cobject or array\u003e\"  // depends on channel\n}\n```\n\n### Subscribe\n\nTo receive updates from websocket API send `subscribe` request to server.\n\n```json\n{\n    \"method\": \"subscribe\",\n    \"body\": {\n        \"channel\": \"\u003cCHANNEL_NAME\u003e\",\n        \"filters\": {\n            // pass channel filters\n        }\n    }\n}\n```\n\nNow 2 channels are supported:\n\n* `head` - receive information about indexer state update. Channel does not have any filters. Subscribe message should looks like:\n\n```json\n{\n    \"method\": \"subscribe\",\n    \"body\": {\n        \"channel\": \"head\"\n    }\n}\n```\n\nNotification body of `responses.State` type will be sent to the channel.\n\n* `blocks` - receive information about new blocks. Channel does not have any filters. Subscribe message should looks like:\n\n```json\n{\n    \"method\": \"subscribe\",\n    \"body\": {\n        \"channel\": \"blocks\"\n    }\n}\n```\n\nNotification body of `responses.Block` type will be sent to the channel.\n\n\n### Unsubscribe\n\nTo unsubscribe send `unsubscribe` message containing one of channel name describing above.\n\n\n```json\n{\n    \"method\": \"unsubscribe\",\n    \"body\": {\n        \"channel\": \"\u003cCHANNEL_NAME\u003e\",\n    }\n}\n```\n",
                 "produces": [
                     "application/json"
                 ],
diff --git a/cmd/api/docs/swagger.yaml b/cmd/api/docs/swagger.yaml
index edf764a..ac61adc 100644
--- a/cmd/api/docs/swagger.yaml
+++ b/cmd/api/docs/swagger.yaml
@@ -1823,6 +1823,17 @@ paths:
       description: |
         ## Documentation for websocket API
 
+        ### Notification
+
+        The structure of notification is following in all channels:
+
+        ```json
+        {
+            "channel": "channel_name",
+            "body": "<object or array>"  // depends on channel
+        }
+        ```
+
         ### Subscribe
 
         To receive updates from websocket API send `subscribe` request to server.
@@ -1852,7 +1863,7 @@ paths:
         }
         ```
 
-        In that channel messages of `responses.State` type will be sent.
+        Notification body of `responses.State` type will be sent to the channel.
 
         * `blocks` - receive information about new blocks. Channel does not have any filters. Subscribe message should looks like:
 
@@ -1865,7 +1876,7 @@ paths:
         }
         ```
 
-        In that channel messages of `responses.Block` type will be sent.
+        Notification body of `responses.Block` type will be sent to the channel.
 
 
         ### Unsubscribe
diff --git a/cmd/api/handler/ws_test.go b/cmd/api/handler/ws_test.go
index fb648a3..7999de8 100644
--- a/cmd/api/handler/ws_test.go
+++ b/cmd/api/handler/ws_test.go
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: 2024 PK Lab AG <contact@pklab.io>
+// SPDX-License-Identifier: MIT
+
 package handler
 
 import (