Add continuous deployment

.github/workflows/deploy.yml

@@ -0,0 +1,22 @@
+name: Continuous Deployment
+
+on:
+  push:
+    branches: [ main ]
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@main
+      - uses: actions/setup-node@main
+        with:
+          node-version: 12
+      
+      - name: Install dependencies
+        run: |
+          npm ci
+          cd functions && npm ci
+      
+      - name: Firebase deploy
+        run: npm run build && firebase deploy

.gitignore

@@ -63,5 +63,4 @@ node_modules/
 .yarn-integrity
 
 # dotenv environment variables file
-.env
-firebase.js
+.env