fix: use gitea token for git push auth

.woodpecker.yml

@@ -19,16 +19,13 @@ steps:
         from_secret: docker_password
 
   - name: update-manifests
-    image: alpine/curl
-    settings:
-      token:
+    image: alpine/git
+    environment:
+      GITEA_TOKEN:
         from_secret: gitea_token
     commands:
-      - apk add --no-cache jq sed > /dev/null 2>&1
-      - 'FILE_SHA=$(curl -sk -H "Authorization: token $PLUGIN_TOKEN" "https://git.mikhailkilin.ru/api/v1/repos/killingdruid/bcard/contents/k8s/bcard.yaml" | jq -r .sha)'
-      - 'echo "File SHA: $FILE_SHA"'
-      - 'CURRENT=$(curl -sk -H "Authorization: token $PLUGIN_TOKEN" "https://git.mikhailkilin.ru/api/v1/repos/killingdruid/bcard/raw/k8s/bcard.yaml")'
-      - 'UPDATED=$(echo "$CURRENT" | sed "s#image: git.mikhailkilin.ru/killingdruid/bcard:.*#image: git.mikhailkilin.ru/killingdruid/bcard:$CI_COMMIT_SHA#")'
-      - 'NEW_CONTENT=$(printf "%s" "$UPDATED" | base64 -w 0)'
-      - 'RESULT=$(curl -sk -X PUT -H "Authorization: token $PLUGIN_TOKEN" -H "Content-Type: application/json" -d "{\"content\":\"$NEW_CONTENT\",\"message\":\"[CI SKIP] deploy: $CI_COMMIT_SHA\",\"sha\":\"$FILE_SHA\"}" "https://git.mikhailkilin.ru/api/v1/repos/killingdruid/bcard/contents/k8s/bcard.yaml")'
-      - 'echo "$RESULT" | jq -r ".content.name // .message"'
+      - 'sed -i "s#image: git.mikhailkilin.ru/killingdruid/bcard:.*#image: git.mikhailkilin.ru/killingdruid/bcard:${CI_COMMIT_SHA}#" k8s/bcard.yaml'
+      - git config user.email "woodpecker@ci"
+      - git config user.name "Woodpecker CI"
+      - git add k8s/bcard.yaml
+      - 'git diff --cached --quiet && echo "No changes to deploy" || (git commit -m "[CI SKIP] deploy: ${CI_COMMIT_SHA}" && git remote set-url origin https://${GITEA_TOKEN}@git.mikhailkilin.ru/killingdruid/bcard.git && git push origin HEAD:main)'