Adds possibility to set node stereotype (SeleniumHQ#1666)

* Allow SE_NODE_STEREOTYPE env var to set the stereotype

* Adds SE_NODE_STEREOTYPE to Readme

* Adds example with default value for SE_NODE_STEREOTYPE

[deploy]

Author: schmetzyannick

NodeBase/generate_config

@@ -59,7 +59,12 @@ elif [[ "${SE_NODE_BROWSER_NAME}" == "MicrosoftEdge" ]]; then
     SE_NODE_BROWSER_VERSION=$(short_version $(microsoft-edge --version | awk '{print $3}'))
 fi
 
+if [[ -z "$SE_NODE_STEREOTYPE" ]]; then
 SE_NODE_STEREOTYPE="{\"browserName\": \"${SE_NODE_BROWSER_NAME}\", \"browserVersion\": \"${SE_NODE_BROWSER_VERSION}\", \"platformName\": \"Linux\"}"
+else
+SE_NODE_STEREOTYPE="$SE_NODE_STEREOTYPE"
+fi
+
 echo "[[node.driver-configuration]]" >> "$FILENAME"
 echo "display-name = \"${SE_NODE_BROWSER_NAME}\"" >> "$FILENAME"
 echo "stereotype = '${SE_NODE_STEREOTYPE}'" >> "$FILENAME"

README.md

@@ -779,11 +779,16 @@ In both cases, it is necessary to tell the Node where the Event Bus is, so it ca
 the purpose of the `SE_EVENT_BUS_HOST`, `SE_EVENT_BUS_PUBLISH_PORT` and `SE_EVENT_BUS_SUBSCRIBE_PORT` environment
 variables.
 
-Here is an example with the default values of these environment variables:
+In some cases, for example if you want to tag a node, it might be necessary to supply a custom stereotype to the node config. The environement variable `SE_NODE_STEREOTYPE`
+sets the stereotype entry in the node's `config.toml`. An example config.toml file can be found here: [Setting custom capabilities for matching specific Nodes](https://www.selenium.dev/documentation/grid/configuration/toml_options/#setting-custom-capabilities-for-matching-specific-nodes).
 
+Here is an example with the default values of these environment variables:
 ```bash
-$ docker run -d -e SE_EVENT_BUS_HOST=<event_bus_ip|event_bus_name> -e SE_EVENT_BUS_PUBLISH_PORT=4442 \ 
-  -e SE_EVENT_BUS_SUBSCRIBE_PORT=4443 --shm-size="2g" selenium/node-chrome:4.4.0-20220812
+$ docker run -d \
+  -e SE_EVENT_BUS_HOST=<event_bus_ip|event_bus_name> \
+  -e SE_EVENT_BUS_PUBLISH_PORT=4442 \
+  -e SE_EVENT_BUS_SUBSCRIBE_PORT=4443 -e SE_NODE_STEREOTYPE="{\"browserName\":\"${SE_NODE_BROWSER_NAME}\",\"browserVersion\":\"${SE_NODE_BROWSER_VERSION}\",\"platformName\": \"Linux\"}" \
+  --shm-size="2g" selenium/node-chrome:4.4.0-20220812
 ```
 
 ### Setting Screen Resolution