add root dockerfile that contains binaries for all services

Dockerfile

@@ -0,0 +1,50 @@
+# Multi-stage build for predict-otron-9000 workspace
+FROM rust:1 AS builder
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y \
+    pkg-config \
+    libssl-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create app directory
+WORKDIR /app
+
+# Copy workspace files
+COPY Cargo.toml Cargo.lock ./
+COPY crates/ ./crates/
+COPY integration/ ./integration/
+
+# Build all 3 main server binaries in release mode
+RUN cargo build --release -p predict-otron-9000 --bin predict-otron-9000 --no-default-features -p embeddings-engine --bin embeddings-engine -p inference-engine --bin inference-engine
+
+# Runtime stage
+FROM debian:bookworm-slim AS runtime
+
+# Install runtime dependencies
+RUN apt-get update && apt-get install -y \
+    ca-certificates \
+    libssl3 \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create app user
+RUN useradd -r -s /bin/false -m -d /app appuser
+
+# Set working directory
+WORKDIR /app
+
+# Copy binaries from builder stage
+COPY --from=builder /app/target/release/predict-otron-9000 ./bin/
+COPY --from=builder /app/target/release/embeddings-engine ./bin/
+COPY --from=builder /app/target/release/inference-engine ./bin/
+# Make binaries executable and change ownership
+RUN chmod +x ./bin/* && chown -R appuser:appuser /app
+
+# Switch to non-root user
+USER appuser
+
+# Expose ports (adjust as needed based on your services)
+EXPOSE 8080 8081 8082
+
+# Default command (can be overridden)
+CMD ["./bin/predict-otron-9000"]