Updated dockerfile & build for dockerized puppeteer

Dockerfile

@@ -8,9 +8,32 @@ COPY tsconfig.json ./
 COPY src ./src
 RUN pnpm run build
 # final image
-FROM node:14.15.1-alpine3.12
+FROM alpine:edge
+WORKDIR /app
+RUN apk add --no-cache \
+      chromium \
+      nss \
+      freetype \
+      freetype-dev \
+      harfbuzz \
+      ca-certificates \
+      ttf-freefont \
+      nodejs \
+      yarn
+
+# Tell Puppeteer to skip installing Chrome. We'll be using the installed package.
+ENV PUPPETEER_SKIP_CHROMIUM_DOWNLOAD=true \
+    PUPPETEER_EXECUTABLE_PATH=/usr/bin/chromium-browser
+
+RUN addgroup -S pptruser && adduser -S -g pptruser pptruser \
+    && mkdir -p /home/pptruser/Downloads /app \
+    && chown -R pptruser:pptruser /home/pptruser \
+    && chown -R pptruser:pptruser /app
+
+# Run everything after as non-privileged user.
+USER pptruser
+
 COPY package.json ./
-RUN npm i -g pnpm
-RUN pnpm i --prod
-COPY --from=0 /app/dist dist
-ENTRYPOINT ["node", "dist/app.js"]
+RUN yarn
+COPY --from=0 /app/dist app
+ENTRYPOINT ["node", "app/app.js"]