First stab at an ES8 linter.

es8/Dockerfile

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+FROM node:8-alpine
+
+# eslint
+RUN yarn global add eslint@4.7.2
+COPY eslint.json /usr/eslint.json
+
+# prettier
+RUN yarn global add \
+    prettier@1.8.2 \
+    eslint-config-prettier@2.6.0 \
+    eslint-plugin-prettier@2.3.1
+
+# entrypoint
+COPY entrypoint.sh /bin/entrypoint.sh
+ENTRYPOINT [ "/bin/entrypoint.sh" ]

es8/entrypoint.sh

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+#!/bin/sh
+
+set -e
+
+eslint --config=/usr/eslint.json **/*.js || exit $?

es8/eslint.json

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+{
+    "extends": [
+        "prettier"
+    ],
+    "plugins": [
+        "prettier"
+    ],
+    "parserOptions": {
+        "ecmaFeatures": {
+            "experimentalObjectRestSpread": true
+        },
+        "ecmaVersion": 8
+    },
+    "rules": {
+        "prettier/prettier": [
+            "error",
+            {
+                "semi": false,
+                "singleQuote": true,
+                "trailingComma": "es5"
+            }
+        ]
+    }
+}