add and test dockerfile build and run

Dockerfile

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+# Stage 1: Build
+FROM golang:1.23 AS builder
+
+# Set the working directory inside the container
+WORKDIR /app
+
+# volume for nkode.db
+VOLUME /app/data/sqlite
+VOLUME /app/data/icons
+
+# Copy go.mod and go.sum files
+COPY go.mod go.sum ./
+
+# Download all dependencies
+RUN go mod download
+
+# Copy the rest of the application code
+COPY . .
+
+# Build the application
+RUN go build
+
+# Stage 2: Runtime
+FROM debian:bookworm-slim
+
+#ENV FRONTEND_HOST=https://app.nkode.tech
+ENV FRONTEND_HOST=http://localhost:8090
+ENV SVG_DIR=/app/data/icons
+ENV DB_PATH=/app/data/sqlite/nkode.db
+ENV SQLITE_DB=/app/data/sqlite/nkode.db
+# Set the working directory inside the runtime container
+WORKDIR /app
+
+# Copy the compiled Go binary from the builder stage
+COPY --from=builder /app/go-nkode .
+
+# Expose the port the application will run on
+EXPOSE 8080
+
+# Command to run the application
+CMD ["./go-nkode"]