Config/eslint (#78)

* config/eslint: upgrade eslint config
* config/eslint: version bump

server/.eslintrc

@@ -0,0 +1,19 @@
+{
+  "parserOptions": {
+    "sourceType": "module"
+  },
+  "env": {
+    "node": true
+  },
+  "extends": [
+    "eslint:recommended",
+    "plugin:prettier/recommended"
+  ],
+  "plugins": [],
+  "rules": {
+    "prettier/prettier": ["error", {
+      "endOfLine": "auto",
+      "singleQuote": true
+    }]
+  }
+}