feat(ci): add GHA workflows, fix node version

.github/workflows/ci.yml

@@ -0,0 +1,19 @@
+name: ci
+
+on:  
+  push:
+  pull_request:
+    branches:
+      - main
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@v3
+      - name: Build docker image
+        uses: docker/build-push-action@v3
+        with:
+          push: false
+          tags: avaplatform/avalanche-faucets:ci

.github/workflows/release.yaml

@@ -0,0 +1,22 @@
+name: release Docker image
+
+on:
+  release:
+    types: [published]
+jobs:
+  push_to_registry:
+    name: Push Docker image to Docker Hub
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@v3
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+      - name: Push to Docker Hub
+        uses: docker/build-push-action@v3
+        with:
+          push: true
+          tags: avaplatform/avalanche-faucet:${{ github.event.release.tag_name }}

Dockerfile

@@ -1,4 +1,4 @@
-FROM node:latest
+FROM node:18.2.0
 
 WORKDIR /avalanche-faucet