feat: Add Docker support and fix build issues

Dockerfile

@@ -0,0 +1,35 @@
+FROM node:20-alpine AS builder
+
+RUN mkdir -p /data && chown node:node /data
+
+WORKDIR /app
+
+COPY package.json .
+RUN npm install
+
+COPY . .
+
+RUN npm run build
+
+FROM node:20-alpine
+
+WORKDIR /app
+
+RUN addgroup -S appgroup && adduser -S appuser -G appgroup
+
+COPY package.json .
+RUN npm install --omit=dev
+
+RUN mkdir -p /data
+RUN touch /data/portal-btc.db
+
+COPY --from=builder /app/build .
+
+VOLUME /data
+RUN chown -R appuser:appgroup /app /data
+
+USER appuser
+
+EXPOSE 3000
+
+CMD ["node", "index.js"]