Fixes around Github actions and Companion deploys. (#2717)

.github/workflows/companion-deploy.yml

@@ -1,4 +1,5 @@
 name: Companion Deploy
+
 on:
   push:
     branches: [master]
@@ -7,9 +8,13 @@ jobs:
   docker:
     name: DockerHub
     runs-on: ubuntu-latest
+    env: 
+      DOCKER_BUILDKIT: 0
+      COMPOSE_DOCKER_CLI_BUILD: 0
     steps:
       - name: Checkout sources
         uses: actions/checkout@v2
+      - uses: docker/setup-buildx-action@v1        
       - name: Log in to DockerHub
         uses: docker/login-action@v1
         with:
@@ -18,6 +23,7 @@ jobs:
       - name: Build and push
         uses: docker/build-push-action@v2
         with:
+          push: true
           context: packages/@uppy/companion
           file: packages/@uppy/companion/Dockerfile
           # TODO add a companion version tag if this is a "Release" commit

packages/@uppy/companion/Dockerfile

@@ -1,4 +1,4 @@
-FROM node:10.21.0-alpine
+FROM node:14.15.3-alpine
 
 COPY package.json /app/package.json