feat(docker): add multi-stage build for Deno application

- Introduces a multi-stage Dockerfile to build and run a Deno app
- Uses a builder stage to compile the app into a self-contained binary
- Adds minimal runtime stage with environment variable configuration
- Improves container efficiency and reduces runtime dependencies

Dockerfile

@@ -0,0 +1,36 @@
+# -------- Stage 1: Build the Deno application --------
+FROM denoland/deno:latest AS builder
+
+# Set the working directory inside the builder container
+WORKDIR /app
+
+# Copy the application source code and configuration files
+COPY src/ ./src/
+COPY deno.jsonc ./deno.jsonc
+COPY import_map.json ./import_map.json
+
+# Compile the application to a self-contained native binary
+# Permissions and flags should be specified during compile time
+RUN deno task compile
+
+# -------- Stage 2: Minimal runtime environment --------
+FROM denoland/deno:alpine
+
+# Optional: Install curl for container-level health checks (not needed for production-only binaries)
+RUN apk add --no-cache curl
+
+# Copy only the compiled application binary from the builder stage
+COPY --from=builder /app/app /app/app
+
+# Set the working directory for the runtime container
+WORKDIR /app
+
+# Define expected environment variables (can be overridden at runtime)
+ENV PROXY_HOST=0.0.0.0
+ENV PROXY_PORT=8011
+ENV LT_SERVER_HOST=localhost
+ENV LT_SERVER_PORT=8010
+ENV API_KEYS=demo-key
+
+# Define the default command to run the application binary
+CMD ["/app/app"]