Use node 14 instead of node 16 as node 14 is LTS

The recent change in node 16 has caused jest to break and thence our CI.
This PR changes to use Node 14 instead of 16.

Closes go-gitea#16591

Signed-off-by: Andrew Thornton <[email protected]>

Author: zeripath

.drone.yml

@@ -15,12 +15,12 @@ trigger:
 steps:
   - name: deps-frontend
     pull: always
-    image: node:16
+    image: node:14
     commands:
       - make node_modules
 
   - name: lint-frontend
-    image: node:16
+    image: node:14
     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:14
     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:14
     commands:
       - make test-frontend
     depends_on: [lint-frontend]
 
   - name: build-frontend
-    image: node:16
+    image: node:14
     commands:
       - make frontend
     depends_on: [test-frontend]