feat: update package.json for prerendering and add react-snap dependency

.github/workflows/deploy.yml

@@ -53,6 +53,8 @@ jobs:
 
       - name: Build app
         run: npm run build
+        env:
+          PUPPETEER_EXECUTABLE_PATH: /usr/bin/google-chrome-stable
 
   unit-tests:
     runs-on: ubuntu-latest

CLAUDE.md

@@ -0,0 +1,70 @@
+# Spark — Claude Code Guidelines
+
+Behavioral guidelines to reduce common LLM coding mistakes.
+
+**Tradeoff:** These guidelines bias toward caution over speed. For trivial tasks, use judgment.
+
+## 1. Think Before Coding
+
+**Don't assume. Don't hide confusion. Surface tradeoffs.**
+
+Before implementing:
+
+- State your assumptions explicitly. If uncertain, ask.
+- If multiple interpretations exist, present them - don't pick silently.
+- If a simpler approach exists, say so. Push back when warranted.
+- If something is unclear, stop. Name what's confusing. Ask.
+
+## 2. Simplicity First
+
+**Minimum code that solves the problem. Nothing speculative.**
+
+- No features beyond what was asked.
+- No abstractions for single-use code.
+- No "flexibility" or "configurability" that wasn't requested.
+- No error handling for impossible scenarios.
+- If you write 200 lines and it could be 50, rewrite it.
+
+Ask yourself: "Would a senior engineer say this is overcomplicated?" If yes, simplify.
+
+## 3. Surgical Changes
+
+**Touch only what you must. Clean up only your own mess.**
+
+When editing existing code:
+
+- Don't "improve" adjacent code, comments, or formatting.
+- Don't refactor things that aren't broken.
+- Match existing style, even if you'd do it differently.
+- If you notice unrelated dead code, mention it - don't delete it.
+
+When your changes create orphans:
+
+- Remove imports/variables/functions that YOUR changes made unused.
+- Don't remove pre-existing dead code unless asked.
+
+The test: Every changed line should trace directly to the user's request.
+
+## 4. Goal-Driven Execution
+
+**Define success criteria. Loop until verified.**
+
+Transform tasks into verifiable goals:
+
+- "Add validation" → "Write tests for invalid inputs, then make them pass"
+- "Fix the bug" → "Write a test that reproduces it, then make it pass"
+- "Refactor X" → "Ensure tests pass before and after"
+
+For multi-step tasks, state a brief plan:
+
+```
+1. [Step] → verify: [check]
+2. [Step] → verify: [check]
+3. [Step] → verify: [check]
+```
+
+Strong success criteria let you loop independently. Weak criteria ("make it work") require constant clarification.
+
+---
+
+**These guidelines are working if:** fewer unnecessary changes in diffs, fewer rewrites due to overcomplication, and clarifying questions come before implementation rather than after mistakes.

Dockerfile

@@ -1,5 +1,6 @@
 FROM node:22-alpine AS builder
 WORKDIR /app
+RUN apk add --no-cache chromium
 COPY package*.json ./
 RUN npm ci
 COPY . .

index.html

@@ -3,6 +3,8 @@
   <head>
     <meta charset="UTF-8" />
     <link rel="icon" href="/favicon.png" type="image/png" />
+    <link rel="preconnect" href="https://www.googletagmanager.com" />
+    <link rel="dns-prefetch" href="https://www.googletagmanager.com" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <meta
       name="description"

nginx.conf

@@ -6,6 +6,20 @@ server {
   root /usr/share/nginx/html;
   index index.html;
 
+  gzip on;
+  gzip_types text/plain text/css application/javascript application/json image/svg+xml;
+  gzip_min_length 1024;
+
+  location /assets/ {
+    expires 1y;
+    add_header Cache-Control "public, immutable";
+  }
+
+  location = /index.html {
+    expires 1h;
+    add_header Cache-Control "public, must-revalidate";
+  }
+
   location / {
     try_files $uri $uri/ /index.html;
   }