Use node:16.5 for frontend instead of node:16 (#16591)

* Disable frontend testing

Jest does not appear to work on the latest node 16.6.0 and fails with an inscrutable
message.

I have been unable to work out what the problem is. This PR simply disables the
test-frontend part in the makefile.

Another alternative would be to drop node to node 14 - which is the LTS for node.

Signed-off-by: Andrew Thornton <art27@cantab.net>

* actually just tell on 16.5 instead

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Use node 16.5 instead of 16

Signed-off-by: Andrew Thornton <art27@cantab.net>

.drone.yml

@@ -15,12 +15,12 @@ trigger:
 steps:
   - name: deps-frontend
     pull: always
-    image: node:16
+    image: node:16.5
     commands:
       - make node_modules
 
   - name: lint-frontend
-    image: node:16
+    image: node:16.5
     commands:
       - make lint-frontend
     depends_on: [deps-frontend]
@@ -58,7 +58,7 @@ steps:
       TAGS: bindata gogit sqlite sqlite_unlock_notify
 
   - name: checks-frontend
-    image: node:16
+    image: node:16.5
     commands:
       - make checks-frontend
     depends_on: [deps-frontend]
@@ -71,13 +71,13 @@ steps:
     depends_on: [lint-backend]
 
   - name: test-frontend
-    image: node:16
+    image: node:16.5
     commands:
       - make test-frontend
     depends_on: [lint-frontend]
 
   - name: build-frontend
-    image: node:16
+    image: node:16.5
     commands:
       - make frontend
     depends_on: [test-frontend]