Fix: copy server/ directory into Docker runtime image

Dockerfile

@@ -18,6 +18,7 @@ RUN npm ci --omit=dev
 
 COPY --from=build /app/dist ./dist
 COPY server.js ./server.js
+COPY server/ ./server/
 COPY --from=build /app/A_Study_of_Titus.pdf ./A_Study_of_Titus.pdf
 
 # Copy seed data to a separate directory so the entrypoint can seed /app/data