chore: change deploy action to trigger on release

Author: samuelmaddock

.github/workflows/deploy.yml

@@ -1,17 +1,17 @@
 name: Deploy
 
 on:
-  push:
-    branches:
-      - master
+  release:
+    types:
+      - published
 
 jobs:
   deploy:
     runs-on: ubuntu-latest
 
     steps:
     - name: Checkout Repo
-      uses: actions/checkout@v1
+      uses: actions/checkout@v2
 
     - name: Setup Node
       uses: actions/setup-node@v1
@@ -22,16 +22,16 @@ jobs:
       run: |
         yarn install
 
-    - name: Build signal server
-      working-directory: ./packages/metastream-signal-server
-      run: |
-        yarn build
-
     - name: Create dotenv file
       working-directory: ./packages/metastream-app
       run: |
         echo "${{ secrets.DOTENV_CONTENTS }}" >> .env
 
+    - name: Build signal server
+      working-directory: ./packages/metastream-signal-server
+      run: |
+        yarn build
+
     - name: Build web app
       working-directory: ./packages/metastream-app
       run: |