diff --git a/.eslintignore b/.eslintignore
index ef1d1bd..9515cb8 100644
--- a/.eslintignore
+++ b/.eslintignore
@@ -1,2 +1,3 @@
 */models/index.js
-*/migrations/*
\ No newline at end of file
+*/migrations/*
+/tests
\ No newline at end of file
diff --git a/.eslintrc.json b/.eslintrc.json
index 3a6e0b8..8522969 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -1,3 +1,13 @@
 {
-    "extends": "eslint-config-trybe-backend"
-}
\ No newline at end of file
+  "extends": "eslint-config-trybe-backend",
+  "rules": {
+    "max-lines-per-function": [
+      "error",
+      {
+        "max": 2000,
+        "skipBlankLines": true,
+        "skipComments": true
+      }
+    ]
+  }
+}
diff --git a/.github/workflow/main.yml b/.github/workflow/main.yml
new file mode 100644
index 0000000..561ac51
--- /dev/null
+++ b/.github/workflow/main.yml
@@ -0,0 +1,14 @@
+name: heroku-back-end
+
+on: [push, pull_request]
+
+jobs:
+  eslint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v1
+      - name: Instala dependências
+        run: npm install
+      - name: Roda ESlint
+        run: npm run lint
\ No newline at end of file
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..31eccbf
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,11 @@
+FROM node:alpine
+
+WORKDIR  /app
+
+COPY package.json .
+
+RUN npm install
+
+COPY . .
+
+CMD ["node", "src/api/server.js"]
\ No newline at end of file
diff --git a/heroku.yml b/heroku.yml
new file mode 100644
index 0000000..07338e9
--- /dev/null
+++ b/heroku.yml
@@ -0,0 +1,5 @@
+build:
+  docker:
+    web: Dockerfile
+run:
+  web: node src/api/server.js
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index 34ef327..6a163bf 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5955,7 +5955,7 @@
     "object-assign": {
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",
-      "integrity": "sha1-IQmtx5ZYh8/AXLvUQsrIv7s2CGM="
+      "integrity": "sha512-rJgTQnkUnH1sFw8yT6VSU3zD3sWmu6sZhIseY8VX+GRu3P6F7Fu+JNDoXfklElbLJSnc3FUQHVe4cU5hj+BcUg=="
     },
     "object-inspect": {
       "version": "1.11.0",
diff --git a/package.json b/package.json
index a42645a..cd7a62a 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,8 @@
   "scripts": {
     "test": "jest tests",
     "start": "node src/api/server",
-    "dev": "nodemon src/api/server"
+    "dev": "nodemon src/api/server",
+    "lint": "eslint --no-inline-config --ext .js,.jsx --no-error-on-unmatched-pattern -c .eslintrc.json ."
   },
   "keywords": [],
   "author": "",
diff --git a/src/api/app.js b/src/api/app.js
index d7e7a62..e4de604 100644
--- a/src/api/app.js
+++ b/src/api/app.js
@@ -1,12 +1,15 @@
 const express = require('express');
 const rescue = require('express-rescue');
+const cors = require('cors');
 const UserController = require('../controllers/user');
 const errorMiddleware = require('../middlewares/error');
-
+// miguek 
 const app = express();
 
+app.use(cors());
+
 app.get('/users', rescue(UserController));
 
-app.use(errorMiddleware);
+app.use(errorMiddleware); 
 
 module.exports = app;
diff --git a/src/api/server.js b/src/api/server.js
index bdcc2b9..bba635a 100644
--- a/src/api/server.js
+++ b/src/api/server.js
@@ -1,5 +1,6 @@
 const app = require('./app');
-
-const PORT = 3000;
+require('dotenv/config');
+// hoi
+const PORT = process.env.PORT || 3000;
 
 app.listen(PORT, () => console.log(`Rodando na porta ${PORT}`));
diff --git a/src/sequelize/config/config.js b/src/sequelize/config/config.js
index cff33d5..3e5d3c4 100644
--- a/src/sequelize/config/config.js
+++ b/src/sequelize/config/config.js
@@ -1,23 +1,30 @@
+require('dotenv/config');
+
+const { HOST, PASSWORD_POSTGRES, DATABASE, DB_USERNAME, DB_PORT } = process.env;
+
 module.exports = {
   development: {
-    username: 'root',
-    password: null,
-    database: 'database_development',
-    host: '127.0.0.1',
+    username: DB_USERNAME,
+    password: PASSWORD_POSTGRES,
+    database: DATABASE,
+    host: HOST,
+    port: DB_PORT,
     dialect: 'postgres',
   },
   test: {
-    username: 'root',
-    password: null,
-    database: 'database_test',
-    host: '127.0.0.1',
+    username: DB_USERNAME,
+    password: PASSWORD_POSTGRES,
+    database: DATABASE,
+    host: HOST,
+    port: DB_PORT,
     dialect: 'postgres',
   },
   production: {
-    username: 'root',
-    password: null,
-    database: 'database_test',
-    host: '127.0.0.1',
+    username: DB_USERNAME,
+    password: PASSWORD_POSTGRES,
+    database: DATABASE,
+    host: HOST,
+    port: DB_PORT,
     dialect: 'postgres',
   },
 };
\ No newline at end of file
diff --git a/src/sequelize/migrations/20211020194502-create-user.js b/src/sequelize/migrations/20211020194502-create-user.js
index 7c47ebc..d0aec16 100644
--- a/src/sequelize/migrations/20211020194502-create-user.js
+++ b/src/sequelize/migrations/20211020194502-create-user.js
@@ -26,7 +26,7 @@ module.exports = {
       },
     });
   },
-  down: async (queryInterface, Sequelize) => {
+  down: async (queryInterface, _Sequelize) => {
     await queryInterface.dropTable('Users');
   },
-};
\ No newline at end of file
+};