add eslint & .env file

.env.production

@@ -0,0 +1,2 @@
+REACT_APP_PRODUCTION=true
+GENERATE_SOURCEMAP=false

.eslintrc.json

@@ -0,0 +1,25 @@
+{
+  "env": {
+    "browser": true,
+    "es2021": true
+  },
+  "extends": [
+    "eslint:recommended",
+    "plugin:react/recommended",
+    "plugin:@typescript-eslint/recommended"
+  ],
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "ecmaFeatures": {
+      "jsx": true
+    },
+    "ecmaVersion": 12,
+    "sourceType": "module"
+  },
+  "plugins": ["react", "@typescript-eslint"],
+  "rules": {
+    "no-console": "warn",
+    "react/display-name": "off",
+    "@typescript-eslint/explicit-module-boundary-types": "off"
+  }
+}

.gitignore

@@ -14,10 +14,7 @@
 # misc
 .DS_Store
 .env
-.env.local
-.env.development.local
-.env.test.local
-.env.production.local
+.env.development
 
 npm-debug.log*
 yarn-debug.log*

Dockerfile

@@ -1,9 +1,5 @@
 FROM node:14-alpine as builder
 
-ENV NODE_ENV=production
-ENV REACT_APP_CRM=prod
-ENV GENERATE_SOURCEMAP=false
-
 WORKDIR /app
 
 COPY package.json /app/

package.json

@@ -41,14 +41,18 @@
     "@types/react-router-dom": "^5.1.7",
     "@types/styled-components": "^5.1.9",
     "@types/styled-system": "^5.1.11",
-    "cross-env": "^7.0.3",
-    "dotenv": "^8.2.0"
+    "@typescript-eslint/eslint-plugin": "^4.22.0",
+    "@typescript-eslint/parser": "^4.22.0",
+    "eslint": "^7.24.0",
+    "eslint-plugin-react": "^7.23.2"
   },
   "scripts": {
     "test": "craco test",
     "eject": "react-scripts eject",
-    "start": "cross-env NODE_ENV=development REACT_APP_CRM=dev craco start",
-    "build": "craco build"
+    "start": "craco start",
+    "build": "craco build",
+    "eslint": "eslint ./src",
+    "eslint:fix": "eslint ./src --fix"
   },
   "eslintConfig": {
     "extends": "react-app"