fix: images for running code will be built manually

Author: weebao

Dockerfile

@@ -1,17 +1,3 @@
-# Build images first
-FROM docker:latest AS builder
-
-WORKDIR /build
-
-COPY docker/python/ docker/python/
-COPY docker/java/ docker/java/
-COPY docker/cpp/ docker/cpp/
-
-RUN docker build -t beatcode-python:latest docker/python/ && \
-    docker build -t beatcode-java:latest docker/java/ && \
-    docker build -t beatcode-cpp:latest docker/cpp/
-
-# Set up the server
 FROM python:3.11-alpine
 
 WORKDIR /app