Add some Team Broker developement docs

docs/contribute/introduction.md

@@ -127,6 +127,7 @@ likely want to begin.
 1. [Mocking email](#mocking-email)
 1. [Testing](#testing)
 1. [VSCode Tips](#vscode-tips)
+1. [Team Broker](./team-broker.md)
 
 
 ### Create a Stack

docs/contribute/team-broker.md

@@ -0,0 +1,255 @@
+---
+navTitle: Team Broker
+meta:
+  description: How to set up a local instance of EMQX to work with a FlowFuse Development
+  tags:
+    - flowfuse
+    - development
+    - contributing
+---
+
+# Team Broker configuration
+
+The FlowFuse Team Broker makes use of a EMQX instance.
+
+## Requirement
+
+ - Docker
+
+## Configuration files
+
+The following 3 files should be placed in a directory.
+
+
+cluster.hocon
+```
+authentication = [
+  {
+    backend = http
+    body {
+      clientId = "${clientid}"
+      password = "${password}"
+      username = "${username}"
+    }
+    connect_timeout = "15s"
+    enable = true
+    enable_pipelining = 100
+    headers {
+      content-type = "application/json"
+    }
+    mechanism = password_based
+    method = post
+    pool_size = 8
+    request_timeout = "5s"
+    ssl {
+      ciphers = []
+      depth = 10
+      enable = false
+      hibernate_after = "5s"
+      log_level = notice
+      reuse_sessions = true
+      secure_renegotiate = true
+      verify = verify_peer
+      versions = [
+        "tlsv1.3",
+        "tlsv1.2"
+      ]
+    }
+    url = "http://host.docker.internal:3000/api/comms/v2/auth"
+  },
+  {
+    backend = built_in_database
+    bootstrap_file = "${EMQX_ETC_DIR}/auth-built-in-db-bootstrap.csv"
+    bootstrap_type = plain
+    enable = true
+    mechanism = password_based
+    password_hash_algorithm {name = plain, salt_position = disable}
+    user_id_type = username
+  }
+]
+authorization {
+  cache {
+    enable = true
+    excludes = []
+    max_size = 32
+    ttl = "1m"
+  }
+  deny_action = ignore
+  no_match = allow
+  sources = [
+    {
+      body {
+        action = "${action}"
+        topic = "${topic}"
+        username = "${username}"
+      }
+      connect_timeout = "15s"
+      enable = true
+      enable_pipelining = 100
+      headers {
+        content-type = "application/json"
+      }
+      method = post
+      pool_size = 8
+      request_timeout = "30s"
+      ssl {
+        ciphers = []
+        depth = 10
+        enable = false
+        hibernate_after = "5s"
+        log_level = notice
+        reuse_sessions = true
+        secure_renegotiate = true
+        verify = verify_peer
+        versions = [
+          "tlsv1.3",
+          "tlsv1.2"
+        ]
+      }
+      type = http
+      url = "http://host.docker.internal:3000/api/comms/v2/acls"
+    },
+    {   
+      enable = false
+      path = "data/authz/acl.conf"
+      type = file
+    }
+  ]
+}
+listeners {
+  tcp {
+    default {
+      acceptors = 16
+      access_rules = [
+        "allow all"
+      ]
+      bind = "0.0.0.0:1883"
+      enable = true
+      enable_authn = true
+      max_conn_rate = infinity
+      max_connections = infinity
+      mountpoint = "${client_attrs.team}"
+      proxy_protocol = false
+      proxy_protocol_timeout = "3s"
+      tcp_options {
+        active_n = 100
+        backlog = 1024
+        buffer = "4KB"
+        high_watermark = "1MB"
+        keepalive = none
+        nodelay = true
+        reuseaddr = true
+        send_timeout = "15s"
+        send_timeout_close = true
+      }
+      zone = default
+    }
+  }
+  ws {
+    default {
+      acceptors = 16
+      access_rules = [
+        "allow all"
+      ]
+      bind = "0.0.0.0:8083"
+      enable = true
+      enable_authn = true
+      max_conn_rate = infinity
+      max_connections = infinity
+      mountpoint = "${client_attrs.team}"
+      proxy_protocol = false
+      proxy_protocol_timeout = "3s"
+      tcp_options {
+        active_n = 100
+        backlog = 1024
+        buffer = "4KB"
+        high_watermark = "1MB"
+        keepalive = none
+        nodelay = true
+        reuseaddr = true
+        send_timeout = "15s"
+        send_timeout_close = true
+      }
+      websocket {
+        allow_origin_absence = true
+        check_origin_enable = false
+        check_origins = "http://localhost:18083, http://127.0.0.1:18083"
+        compress = false
+        deflate_opts {
+          client_context_takeover = takeover
+          client_max_window_bits = 15
+          mem_level = 8
+          server_context_takeover = takeover
+          server_max_window_bits = 15
+          strategy = default
+        }
+        fail_if_no_subprotocol = true
+        idle_timeout = "7200s"
+        max_frame_size = infinity
+        mqtt_path = "/"
+        mqtt_piggyback = multiple
+        proxy_address_header = "x-forwarded-for"
+        proxy_port_header = "x-forwarded-port"
+        supported_subprotocols = "mqtt, mqtt-v3, mqtt-v3.1.1, mqtt-v5"
+        validate_utf8 = true
+      }
+      zone = default
+    }
+  }
+}
+dashboard {
+  default_password = topSecret
+}
+api_key {
+  bootstrap_file = "/mounted/config/api-keys"
+}
+```
+
+acl.conf
+```
+{allow, {username, {re, "^dashboard$"}}, subscribe, ["$SYS/#"]}.
+
+{allow, {ipaddr, "127.0.0.1"}, all, ["$SYS/#", "#"]}.
+
+{deny, all, subscribe, ["$SYS/#"]}.
+
+{allow, all}.
+```
+
+api-keys
+```
+flowforge:verySecret:administrator
+```
+
+## Starting
+
+The following docker command should be run in the directory the configuration files were stored.
+
+```
+docker run -d --rm \
+  -v $(pwd)/cluster.hocon:/opt/emqx/data/configs/cluster.hocon \
+  -v $(pwd)/api-keys:/mounted/config/api-keys \
+  -v $(pwd)/acl.conf:/opt/emqx/data/authz/acl.conf \
+  --add-host=host.docker.internal:host-gateway \
+  -p 1883:1883 -p 8083:8083 -p 18083:18083 --name emqx emqx/emqx:5.8.0
+```
+
+## Configuring FlowFuse
+
+Make sure the `broker` section of the `flowfuse.yml` is updated as follows
+
+```
+broker:
+  url: mqtt://[::1]:1883
+  public_url: ws://<ip-of-dev-computer>:8083
+  teamBroker:
+    enabled: true
+```
+
+
+## Access to the EQMX Dashboard
+
+You can log into the EMQX Dashboard at `http://locahost:18083`
+
+Username: `admin`
+Password: `topSecret`