Update Dockerfile

Dockerfile

@@ -8,16 +8,16 @@ RUN apt-get update && apt-get install -y git pkg-config libssl-dev
 WORKDIR /app
 RUN git clone https://github.com/engineer-man/piston.git .
 
-# Move into the API directory
-WORKDIR /app/api
+# Move into the correct directory (engine/)
+WORKDIR /app/engine
 
 # Build the API binary
 RUN cargo build --release
 
-# Stage 2: Minimal runtime image
+# Stage 2: Runtime image
 FROM debian:bullseye-slim
 
-# Install Docker CLI (for running sandboxed code)
+# Install Docker CLI (used by Piston to run sandboxed code)
 RUN apt-get update && \
     apt-get install -y curl gnupg lsb-release && \
     curl -fsSL https://download.docker.com/linux/debian/gpg | gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg && \
@@ -27,15 +27,15 @@ RUN apt-get update && \
 # Working directory
 WORKDIR /app
 
-# Copy the built binary
-COPY --from=builder /app/api/target/release/piston-api /usr/local/bin/piston
+# Copy compiled binary
+COPY --from=builder /app/engine/target/release/piston-api /usr/local/bin/piston
 
-# Copy runtime config
-COPY --from=builder /app/api/Runtimes.toml ./Runtimes.toml
+# Copy Runtimes.toml (optional; may not exist in new layout)
+COPY --from=builder /app/engine/Runtimes.toml ./Runtimes.toml
 
-# Set the port
+# Set Piston's port to 7860
 ENV PORT=7860
 EXPOSE 7860
 
-# Launch the Piston API
+# Start the server
 CMD ["piston"]