shift asset processing to webpack (#424)

also migrated SASS to latest syntax (via dart-sass) and vastly simplified light/dark theme logic

.github/workflows/ci.yml

@@ -34,8 +34,8 @@ jobs:
         node-version: 14.x
     - name: Install dependencies
       run: yarn install --frozen-lockfile
-    - name: Build preview
-      run: yarn build:hugo --environment=development --baseURL=/ --buildDrafts --buildFuture
+    - name: Build site
+      run: yarn build
     - name: Percy snapshots
       uses: percy/snapshot-action@v0.1.2
       env:

.github/workflows/post-deploy.yml

@@ -16,6 +16,7 @@ jobs:
       with:
         fetch-depth: 0
     - uses: getsentry/action-release@v1
+      if: github.event.deployment_status.environment == 'production'
       env:
         SENTRY_AUTH_TOKEN: ${{ secrets.SENTRY_AUTH_TOKEN }}
         SENTRY_ORG: jakejarvis