Use official docker images for CI runs (#1361)

Author: big-r81

.github/workflows/main.yml

@@ -1,5 +1,5 @@
 name: CI
-on: [push, pull_request]
+on: [ push, pull_request ]
 jobs:
   run-unit-tests:
     name: Run unit tests
@@ -21,13 +21,13 @@ jobs:
   run-e2e-tests:
     name: Run e2e tests
     runs-on: ubuntu-latest
-    needs: [run-unit-tests]
+    needs: [ run-unit-tests ]
     strategy:
       matrix:
         include:
-          - COUCHDB_IMAGE: apache/couchdb:3
+          - COUCHDB_IMAGE: couchdb:3
             NIGHTWATCH_SKIPTAGS: "search,nonpartitioned,couchdb-v2-only"
-          - COUCHDB_IMAGE: apache/couchdb:2.3.1
+          - COUCHDB_IMAGE: couchdb:2.3.1
             NIGHTWATCH_SKIPTAGS: "search,partitioned"
     steps:
     - uses: actions/checkout@v2