refactor(drone): simplify discord notification step

.drone.yml

@@ -53,17 +53,18 @@ steps:
   - name: extract-commit-title
     image: alpine
     commands:
-      - export COMMIT_TITLE="$(echo \"${DRONE_COMMIT_MESSAGE}\" | head -n1)"
-      - echo "COMMIT_TITLE=$COMMIT_TITLE" >> /drone/env
+      - export COMMIT_TITLE=$(echo "${DRONE_COMMIT_MESSAGE}" | head -n1)
+      - echo "COMMIT_TITLE=$COMMIT_TITLE"
 
-  - name: discord notification success
+  - name: discord notification
     image: appleboy/drone-discord
     settings:
       webhook_id:
         from_secret: discord_webhook_id
       webhook_token:
         from_secret: discord_webhook_token
-      color: "#48f442"
+      color: >
+        $(if [ "${DRONE_BUILD_STATUS}" = "success" ]; then echo "#48f442"; else echo "#ff4f42"; fi)
       message:
         - |
           ${DRONE_REPO}
@@ -71,24 +72,7 @@ steps:
           Branch: ${DRONE_COMMIT_BRANCH}
           Link: ${DRONE_BUILD_LINK}
     when:
-      status: [success]
-
-  - name: discord notification failure
-    image: appleboy/drone-discord
-    settings:
-      webhook_id:
-        from_secret: discord_webhook_id
-      webhook_token:
-        from_secret: discord_webhook_token
-      color: "#ff4f42"
-      message:
-        - |
-          ${DRONE_REPO}
-          Commit: ${COMMIT_TITLE}
-          Branch: ${DRONE_COMMIT_BRANCH}
-          Link: ${DRONE_BUILD_LINK}
-    when:
-      status: [failure]
+      status: [success, failure]