circle config: use -node image variant, install gcloud from archive

...instead of from apt repo, temporarily, while GCP's apt repo's PGP key is 500ing.

https://hub.docker.com/r/cimg/python
https://packages.cloud.google.com/apt/doc/apt-key.gpg
https://issuetracker.google.com/issues/160194366
https://app.circleci.com/pipelines/github/snarfed/bridgy-fed/837/workflows/47e2aeb4-bf9f-4260-83ea-92310120c5e8/jobs/1099

.circleci/config.yml

@@ -7,7 +7,7 @@ version: 2.1
 jobs:
   build:
     docker:
-      - image: cimg/python:3.9
+      - image: cimg/python:3.9-node
 
     steps:
       - checkout
@@ -22,13 +22,16 @@ jobs:
       - run:
           name: Base dependencies
           command: |
-            # Node
-            curl -fsSL https://deb.nodesource.com/setup_current.x | sudo bash -
             # google-cloud-sdk: https://cloud.google.com/sdk/docs/install#deb
-            echo "deb [signed-by=/usr/share/keyrings/cloud.google.gpg] https://packages.cloud.google.com/apt cloud-sdk main" | sudo tee -a /etc/apt/sources.list.d/google-cloud-sdk.list
-            curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key --keyring /usr/share/keyrings/cloud.google.gpg add -
+            # https://cloud.google.com/sdk/docs/downloads-versioned-archives
+            # TODO: switch back to apt-get once GCP's repo's GPG key stops 500ing
+            # https://packages.cloud.google.com/apt/doc/apt-key.gpg
+            # https://issuetracker.google.com/issues/160194366
+            wget https://dl.google.com/dl/cloudsdk/channels/rapid/downloads/google-cloud-cli-419.0.0-linux-x86_64.tar.gz
+            tar xzf google-cloud-cli-419.0.0-linux-x86_64.tar.gz
+            ./google-cloud-sdk/bin/gcloud components install beta cloud-datastore-emulator --quiet
             sudo apt-get update
-            sudo apt-get install -y nodejs apt-transport-https ca-certificates gnupg google-cloud-sdk google-cloud-sdk-datastore-emulator default-jre
+            sudo apt-get install -y apt-transport-https ca-certificates default-jre
 
       - run:
           name: Python dependencies
@@ -43,13 +46,14 @@ jobs:
       - run:
           name: JavaScript dependencies
           command: |
+            node --version
             cd browser-extension
             npm install
 
       - run:
           name: Python tests
           command: |
-            CLOUDSDK_CORE_PROJECT=brid-gy gcloud beta emulators datastore start --no-store-on-disk --consistency=1.0 --host-port=localhost:8089 < /dev/null >& /dev/null &
+            CLOUDSDK_CORE_PROJECT=brid-gy ./google-cloud-sdk/bin/gcloud beta emulators datastore start --no-store-on-disk --consistency=1.0 --host-port=localhost:8089 < /dev/null >& /dev/null &
             sleep 5s
             python -m coverage run --source=. --omit=admin.py,appengine_config.py,logs.py,scripts/\*,tests/\* -m unittest discover -v
             if [ "$TWITTER_LIVE_TEST_APP_KEY" != "" ]; then PYTHONPATH=. python tests/twitter_live_test.py --debug; fi