[#217] Add rest-gw service

Signed-off-by: Denis Kirillov <denis@nspcc.ru>

docs/rest_gate.md

@@ -0,0 +1,70 @@
+# REST Gateway
+
+REST Gateway to access data in NeoFS using REST.
+
+Source code and more information can be found in [project's GitHub repository](https://github.com/nspcc-dev/neofs-rest-gw)
+
+## .env settings
+
+### REST_GW_VERSION=0.4.0
+
+Image version label to use for containers.
+
+If you want to use locally built image, just set its label here. 
+Instead of pulling from DockerHub, the local image will be used.
+
+### REST_GW_IMAGE=nspccdev/neofs-rest-gw
+
+Image label prefix to use for containers.
+
+## Usage example
+
+- List container for specific owner:
+
+```shell
+$ curl http://rest.neofs.devenv:8090/v1/containers?ownerId=NbUgTSFvPmsRxmGeWpuuGeJUoRoi6PErcM | jq
+{
+  "containers": [
+    {
+      "attributes": [
+        {
+          "key": "Timestamp",
+          "value": "1663755230"
+        }
+      ],
+      "basicAcl": "fbfbfff",
+      "cannedAcl": "eacl-public-read-write",
+      "containerId": "BKcAvz8awKKy9NGsGKi1Hoxxu9AjTGvjKMNMQamvdLmX",
+      "containerName": "",
+      "ownerId": "NbUgTSFvPmsRxmGeWpuuGeJUoRoi6PErcM",
+      "placementPolicy": "REP 1 IN X\nCBF 1\nSELECT 1 FROM * AS X",
+      "version": "v2.13"
+    }
+  ],
+  "size": 1
+}
+```
+
+
+- Get container info:
+
+```shell
+$ curl http://rest.neofs.devenv:8090/v1/containers/BKcAvz8awKKy9NGsGKi1Hoxxu9AjTGvjKMNMQamvdLmX | jq
+{
+  "attributes": [
+    {
+      "key": "Timestamp",
+      "value": "1663755230"
+    }
+  ],
+  "basicAcl": "fbfbfff",
+  "cannedAcl": "eacl-public-read-write",
+  "containerId": "BKcAvz8awKKy9NGsGKi1Hoxxu9AjTGvjKMNMQamvdLmX",
+  "containerName": "",
+  "ownerId": "NbUgTSFvPmsRxmGeWpuuGeJUoRoi6PErcM",
+  "placementPolicy": "REP 1 IN X\nCBF 1\nSELECT 1 FROM * AS X",
+  "version": "v2.13"
+}
+```
+
+See all available routes http://rest.neofs.devenv:8090/v1/docs