feat: Add Dockerfile for containerization and implement database migrations for both SQLite and Postgres.

Dockerfile

@@ -0,0 +1,27 @@
+FROM rust:1.92 AS builder
+
+WORKDIR /app
+COPY . .
+
+# Build the release binary
+RUN cargo build --release -p template-api
+
+FROM debian:bookworm-slim
+
+WORKDIR /app
+
+# Install OpenSSL (required for many Rust networking crates) and CA certificates
+RUN apt-get update && apt-get install -y libssl3 ca-certificates && rm -rf /var/lib/apt/lists/*
+
+COPY --from=builder /app/target/release/template-api .
+
+
+# Create data directory for SQLite
+RUN mkdir -p /app/data
+
+ENV DATABASE_URL=sqlite:///app/data/template.db
+ENV SESSION_SECRET=supersecretchangeinproduction
+
+EXPOSE 3000
+
+CMD ["./template-api"]