Major update for v1 and tests

Dockerfile

@@ -6,20 +6,37 @@ WORKDIR /app
 COPY package*.json ./
 RUN npm install
 COPY . .
+
+# Pull Google Fonts into ./fonts/ so they end up in the runtime image. If the
+# build host has no network this step will produce missing-variant warnings;
+# the build still succeeds and the server falls back to system fonts.
+RUN npm run fetch-fonts || echo "Font fetch had warnings; continuing with whatever was downloaded."
+
 RUN npm run build
 
 FROM node:20-alpine
 
-RUN apk add --no-cache cairo-dev pango-dev libjpeg-turbo-dev giflib-dev librsvg-dev pixman-dev python3 make g++
+# Cairo + Pango are required by node-canvas at runtime.
+# The font packages cover the proprietary template families (Impact, Times,
+# Courier, Arial) via free equivalents that fontconfig will alias, plus emoji
+# rendering for sticker exports.
+RUN apk add --no-cache \
+    cairo pango libjpeg-turbo giflib librsvg pixman \
+    ttf-liberation ttf-dejavu font-noto font-noto-emoji \
+    fontconfig
 
 WORKDIR /app
 COPY package*.json ./
-RUN npm install --omit=dev && apk del python3 make g++
+RUN npm install --omit=dev
 
 COPY server.js ./
 COPY --from=builder /app/dist ./dist
+COPY --from=builder /app/fonts ./fonts
 RUN mkdir -p /app/uploads /app/exports
 
+# Refresh fontconfig's cache so the newly-copied custom fonts are discoverable.
+RUN fc-cache -f /app/fonts || true
+
 HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
     CMD wget --no-verbose --tries=1 --spider http://localhost:3001/api/health || exit 1