Dockerfile

# Use a specific version of the node image as a base
FROM node:16-alpine

# Install necessary dependencies including JDK, Python, pip, and g++
RUN apk add --no-cache openjdk11 python3 py3-pip g++

# Set working directory
WORKDIR /code

# Copy package.json and package-lock.json and install dependencies
COPY package*.json ./
RUN npm install --production

# Copy the rest of the application files
COPY . .

# Create a directory for temporary files
RUN mkdir -p /code/temp && \
    chmod 777 /code/temp && \
    touch /code/javac_output.txt && \
    chmod 777 /code/javac_output.txt

# Expose port
EXPOSE 7860

# Set user to non-root
USER node

# Compile and run Java code
CMD ["sh", "-c", "javac -d /code/temp /code/temp/*.java 2>&1 | tee /code/javac_output.txt && java -cp /code/temp Main"]