refactor(project): Reorganize frontend and backend directories

backend/video-content/Dockerfile

@@ -0,0 +1,13 @@
+FROM eclipse-temurin:17-jre
+
+# 安装FFmpeg
+RUN apt-get update && \
+    apt-get install -y ffmpeg && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+COPY target/video-content-*.jar app.jar
+
+ENTRYPOINT ["java", "-jar", "app.jar"]