add eslintrc file so decaffeinate can use it

services/chat/.eslintrc

@@ -0,0 +1,77 @@
+{
+    "extends": [
+        "standard",
+        "standard-react",
+        "prettier",
+        "prettier/react",
+        "prettier/standard",
+        "plugin:jsx-a11y/recommended"
+    ],
+    "plugins": [
+        "prettier",
+        "jsx-a11y",
+        "mocha",
+        "chai-expect",
+        "chai-friendly"
+    ],
+    "env": {
+        "mocha": true
+    },
+    "globals": {
+        "expect": true,
+        "define": true,
+        "$": true,
+        "angular": true,
+        // Injected in layout.pug
+        "user_id": true
+    },
+    "settings": {
+        // Tell eslint-plugin-react which version of React we are using
+        "react": {
+            "version": "15"
+        }
+    },
+    "rules": {
+        "max-len": [
+            "error",
+            {
+                "ignoreUrls": true,
+                // Ignore long describe/it test blocks, long import/require statements
+                "ignorePattern": "(^\\s*(it|describe)\\s*\\(['\"]|^import\\s*.*\\s*from\\s*['\"]|^.*\\s*=\\s*require\\(['\"])"
+            }
+        ],
+        // Fix conflict between prettier & standard by overriding to prefer
+        // double quotes
+        "jsx-quotes": [
+            "error",
+            "prefer-double"
+        ],
+        // Override weird behaviour of jsx-a11y label-has-for (says labels must be
+        // nested *and* have for/id attributes)
+        "jsx-a11y/label-has-for": [
+            "error",
+            {
+                "required": {
+                    "some": [
+                        "nesting",
+                        "id"
+                    ]
+                }
+            }
+        ],
+        // Add some mocha specific rules
+        "mocha/handle-done-callback": "error",
+        "mocha/no-exclusive-tests": "error",
+        "mocha/no-global-tests": "error",
+        "mocha/no-identical-title": "error",
+        "mocha/no-nested-tests": "error",
+        "mocha/no-pending-tests": "error",
+        "mocha/no-skipped-tests": "error",
+        // Add some chai specific rules
+        "chai-expect/missing-assertion": "error",
+        "chai-expect/terminating-properties": "error",
+        // Swap the no-unused-expressions rule with a more chai-friendly one
+        "no-unused-expressions": 0,
+        "chai-friendly/no-unused-expressions": "error"
+    }
+}