added docker setup

Dockerfile

@@ -0,0 +1,53 @@
+# Build stage
+FROM golang:1.21-bookworm AS builder
+
+# Install build dependencies
+RUN apt-get update && apt-get install -y \
+    gcc \
+    sqlite3 \
+    libsqlite3-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+# Set working directory
+WORKDIR /build
+
+# Copy go mod files
+COPY go.mod go.sum ./
+
+# Download dependencies
+RUN go mod download
+
+# Copy source code
+COPY . .
+
+# Build the application
+RUN CGO_ENABLED=1 go build -o mealprep -ldflags="-s -w" .
+
+# Runtime stage
+FROM debian:bookworm-slim
+
+# Install runtime dependencies
+RUN apt-get update && apt-get install -y \
+    ca-certificates \
+    sqlite3 \
+    libsqlite3-0 \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create app directory and data directory
+WORKDIR /app
+RUN mkdir -p /app/data
+
+# Copy binary from builder
+COPY --from=builder /build/mealprep .
+
+# Copy static files
+COPY --from=builder /build/static ./static
+
+# Expose port
+EXPOSE 8080
+
+# Set environment variables
+ENV DB_PATH=/app/data/mealprep.db
+
+# Run the application
+CMD ["./mealprep"]