diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 00000000..fd380d57
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,10 @@
+#airbnb
+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+end_of_line = lf
diff --git a/.eslintrc.js b/.eslintrc.js
new file mode 100644
index 00000000..f44c7a1d
--- /dev/null
+++ b/.eslintrc.js
@@ -0,0 +1,10 @@
+module.exports = {
+  extends: '@mate-academy/eslint-config',
+  env: {
+    jest: true
+  },
+  rules: {
+    'no-proto': 0
+  },
+  plugins: ['jest']
+};
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 00000000..def73e60
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,23 @@
+name: Test
+
+on:
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [12.x]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: npm install
+    - run: npm test
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 00000000..bd6a178a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,9 @@
+# IDE
+.idea
+.vscode
+
+# Node
+node_modules
+
+# MacOS
+.DS_Store
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 00000000..f288702d
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
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+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
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+you modify it: responsibilities to respect the freedom of others.
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+not impose a license fee, royalty, or other charge for exercise of
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+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
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+work thus licensed is called the contributor's "contributor version".
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+you grant is automatically extended to all recipients of the covered
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+
+  Nothing in this License shall be construed as excluding or limiting
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+  12. No Surrender of Others' Freedom.
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+  If conditions are imposed on you (whether by court order, agreement or
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+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 00000000..c0df6e48
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,5496 @@
+{
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+            "is-fullwidth-code-point": "^2.0.0",
+            "strip-ansi": "^5.1.0"
+          }
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+            "ansi-regex": "^4.1.0"
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+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-13.1.2.tgz",
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+      "dev": true,
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+}
diff --git a/package.json b/package.json
new file mode 100644
index 00000000..d040afd3
--- /dev/null
+++ b/package.json
@@ -0,0 +1,29 @@
+{
+  "name": "js-task-boilerplate",
+  "version": "1.0.0",
+  "description": "js task boilerplate",
+  "main": "src/sum.js",
+  "scripts": {
+    "init": "mate-scripts init",
+    "start": "mate-scripts start",
+    "lint": "mate-scripts lint",
+    "test:only": "mate-scripts test",
+    "update": "mate-scripts update",
+    "postinstall": "npm run update",
+    "test": "npm run lint && npm run test:only"
+  },
+  "author": "Mate academy",
+  "license": "GPL-3.0",
+  "devDependencies": {
+    "@mate-academy/eslint-config": "*",
+    "@mate-academy/scripts": "^0.3.5",
+    "eslint": "^5.16.0",
+    "eslint-plugin-jest": "^22.4.1",
+    "eslint-plugin-node": "^8.0.1",
+    "jest": "^24.7.0"
+  },
+  "mateAcademy": {
+    "projectType": "javascript"
+  },
+  "dependencies": {}
+}
diff --git a/readme.md b/readme.md
new file mode 100644
index 00000000..01634fc9
--- /dev/null
+++ b/readme.md
@@ -0,0 +1,4 @@
+# Sum() - [put the task name here]
+[put a short description here] Implement the `sum` function returning a sum of two numbers
+
+**Read [the guideline](https://github.com/mate-academy/js_task-guideline/blob/master/README.md) before start**
diff --git a/src/sum.js b/src/sum.js
new file mode 100644
index 00000000..a27d0750
--- /dev/null
+++ b/src/sum.js
@@ -0,0 +1,21 @@
+'use strict';
+
+/**
+ * Implement sum function:
+ *
+ * Function takes 2 numbers and returns their sum
+ *
+ * sum(1, 2) === 3
+ * sum(1, 11) === 12
+ *
+ * @param {number} a
+ * @param {number} b
+ *
+ * @return {number}
+ */
+function sum(a, b) {
+  // write code here
+  return a + b;
+}
+
+module.exports = sum;
diff --git a/src/sum.test.js b/src/sum.test.js
new file mode 100644
index 00000000..98892af5
--- /dev/null
+++ b/src/sum.test.js
@@ -0,0 +1,16 @@
+'use strict';
+/* global require, describe, test, expect */
+
+const sum = require('./sum');
+
+describe('sum', () => {
+  test('should return a sum of positive numbers', () => {
+    expect(sum(1, 2))
+      .toBe(3);
+  });
+
+  test('should return a sum of negative numbers', () => {
+    expect(sum(-1, -2))
+      .toBe(-3);
+  });
+});