Add quality tools for javascript

.babelrc.json

@@ -0,0 +1,3 @@
+{
+  "presets": ["@babel/preset-flow"]
+}

.dockerignore

@@ -5,3 +5,4 @@
 !entrypoint.sh
 !action.yml
 !default-build-script
+!src

.editorconfig

@@ -0,0 +1,18 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = 2
+indent_style = space
+insert_final_newline = true
+max_line_length = 100
+tab_width = 2
+trim_trailing_whitespace = true
+
+[*.md]
+max_line_length = 0
+trim_trailing_whitespace = false
+
+[COMMIT_EDITMSG]
+max_line_length = 0

.eslintignore

@@ -0,0 +1 @@
+**/node_modules/**

.eslintrc.json

@@ -0,0 +1,20 @@
+{
+  "parser": "babel-eslint",
+  "env": {
+    "node": true,
+    "es6": true,
+    "jest": true
+  },
+  "parserOptions": {
+    "ecmaVersion": 2020,
+    "ecmaFeatures": {
+      "impliedStrict": true
+    }
+  },
+  "extends": ["airbnb", "plugin:unicorn/recommended", "prettier"],
+  "plugins": ["react", "jsx-a11y", "import", "prettier", "flowtype", "unicorn"],
+  "settings": { "react": { "version": "latest" } },
+  "rules": {
+    "prettier/prettier": "error"
+  }
+}

.gitignore

@@ -1 +1,3 @@
 .idea
+node_modules
+dist

.prettierrc.json

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+{
+  "semi": true,
+  "singleQuote": true,
+  "trailingComma": "all",
+  "printWidth": 100
+}

.yarnrc

@@ -0,0 +1,3 @@
+save-prefix ""
+--install.audit true
+--add.audit true