fix: remove docker user for code runner

Author: weebao

docker/cpp/Dockerfile

@@ -2,7 +2,6 @@ FROM gcc:11.2.0
 
 WORKDIR /code
 
-# Install Google Test and JsonCpp with proper include paths
 RUN apt-get update && apt-get install -y \
     cmake \
     libgtest-dev \
@@ -12,9 +11,3 @@ RUN apt-get update && apt-get install -y \
     && make \
     && cp lib/*.a /usr/lib \
     && ln -s /usr/include/jsoncpp/json /usr/include/json
-
-# Set security limits
-RUN useradd -m player
-RUN chown -R player:player /code
-RUN chmod -R 777 /code
-USER player

docker/java/Dockerfile

@@ -2,19 +2,10 @@ FROM openjdk:11-jdk-slim
 
 WORKDIR /code
 
-# Install wget to download dependencies
 RUN apt-get update && apt-get install -y wget
 
-# Download JUnit and dependencies to a shorter path
 RUN wget https://repo1.maven.org/maven2/junit/junit/4.13.2/junit-4.13.2.jar -P /lib/
 RUN wget https://repo1.maven.org/maven2/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3.jar -P /lib/
 RUN wget https://repo1.maven.org/maven2/com/google/code/gson/gson/2.8.9/gson-2.8.9.jar -P /lib/
 
-# Set CLASSPATH environment variable with shorter path
 ENV CLASSPATH=/lib/*:/code
-
-# Set up security
-RUN useradd -m player
-RUN chown -R player:player /code
-RUN chmod -R 777 /code
-USER player

docker/python/Dockerfile

@@ -1,12 +1,5 @@
-FROM python:3.9-slim
+FROM python:3.9-alpine
 
 WORKDIR /code
 
-# Install any needed packages
 RUN pip install typing-extensions
-
-# Set security limits
-RUN useradd -m player
-RUN chown -R player:player /code
-RUN chmod -R 777 /code
-USER player