Dockerfile

# Use the base Docker image with necessary dependencies
FROM circulartextapp/spaceread as base

# Set the working directory to /app
WORKDIR /app

# Copy the current directory contents into the container at /app
COPY . /app

# Define the user ID in the environment variable USER_ID with a default value
ARG USER_ID=1000
ENV USER_ID=$USER_ID

# Check if the user already exists
RUN if id "$USER_ID" >/dev/null 2>&1; then \
      echo "User with ID $USER_ID already exists."; \
    else \
      useradd -m -u "$USER_ID" user; \
    fi

# Set appropriate permissions for the application directory
RUN chown -R user:user /app

# Switch to the user for improved security
USER user

# Multi-stage build for installing gosu
FROM alpine as gosu_installer

# Install gosu in the alpine image
RUN apk --no-cache add gosu

# Final stage
FROM base

# Copy gosu from the gosu_installer image
COPY --from=gosu_installer /usr/sbin/gosu /usr/sbin/gosu

# Copy entrypoint.sh separately
COPY entrypoint.sh /usr/local/bin/entrypoint.sh
RUN chmod +x /usr/local/bin/entrypoint.sh