Create Dockerfile

Username: myuser
Password: password

Dockerfile

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+# Use the official Ubuntu image as the base
+FROM ubuntu:20.04
+
+# Set environment variables
+ENV DEBIAN_FRONTEND=noninteractive
+
+# Update the package list and install necessary packages
+RUN apt-get update && \
+    apt-get install -y \
+    shellinabox \
+    sudo \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create a new user and set a password using chpasswd
+RUN useradd -m myuser && \
+    echo "myuser:password" | chpasswd && \
+    adduser myuser sudo
+
+# Expose the Shell In A Box port
+EXPOSE 7860
+
+# Configure Shell In A Box to listen on port 7060
+RUN sed -i 's/--port=4200/--port=7860/g' /etc/default/shellinabox
+
+# Start Shell In A Box
+CMD ["shellinaboxd", "-t", "--no-beep", "--disable-ssl"]