feat: add Dockerfile and implement SQLite persistence layer with repository pattern

Dockerfile

@@ -0,0 +1,29 @@
+FROM rust:1.92 AS builder
+
+WORKDIR /app
+COPY . .
+
+# Build the release binary
+RUN cargo build --release -p api
+
+FROM debian:bookworm-slim
+
+WORKDIR /app
+
+# Install OpenSSL, CA certs, and ffmpeg (provides ffprobe for local-files duration scanning)
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    libssl3 \
+    ca-certificates \
+    && rm -rf /var/lib/apt/lists/*
+
+COPY --from=builder /app/target/release/api .
+
+
+# Create data directory for SQLite
+RUN mkdir -p /app/data
+
+ENV DATABASE_URL=sqlite:///app/data/template.db
+
+EXPOSE 8000
+
+CMD ["./api"]