CI: install yarn like TerriaJS

.github/workflows/ci.yml

@@ -19,7 +19,9 @@ jobs:
         uses: actions/setup-node@v1
         with:
           node-version: ${{ matrix.node-version }}
-      - run: rm -rf node_modules && yarn install --frozen-lockfile
+      - run: |
+          npm install -g yarn@^1.19.0
+          yarn install --frozen-lockfile
       - run: yarn gulp lint release
         env:
           NODE_OPTIONS: '--max_old_space_size=4096'

.gitignore

@@ -16,7 +16,6 @@ datasources/00_National_Data_Sets.json
 
 /wwwroot/editor/
 /error.log
-/error.log
 /output.log
 privateserverconfig.json
 wwwroot/privateconfig.json

.prettierignore

@@ -17,7 +17,6 @@ datasources/00_National_Data_Sets.json
 
 /wwwroot/editor/
 /error.log
-/error.log
 /output.log
 privateserverconfig.json
 wwwroot/privateconfig.json
@@ -34,7 +33,6 @@ package-lock.json
 
 # Generated files
 yarn.lock
-.yarn/releases/
 
 # wwwroot
 wwwroot/help/
@@ -43,4 +41,4 @@ wwwroot/*.html
 
 
 ckanext-cesiumpreview
-deploy/helm/terria/charts/terriamap/templates/
+deploy/helm/terria/charts/terriamap/templates/