Initial open-source release (MIT): image2api AI gateway

Full Go backend + Vue 3 frontend, OpenAI-compatible API, multi-provider
account pools, billing/admin, Docker one-command deploy with auto HTTPS.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/Dockerfile

@@ -0,0 +1,23 @@
+# syntax=docker/dockerfile:1
+# Frontend is open-source: built from source inside the image, then served by
+# nginx which also reverse-proxies the API and terminates TLS (certs from the
+# acme.sh sidecar via a shared volume).
+# ---- build stage ----
+FROM node:22-alpine AS build
+WORKDIR /app
+COPY package*.json ./
+RUN npm install
+COPY . .
+RUN npm run build
+
+# ---- serve stage ----
+FROM nginx:1.27-alpine
+# openssl: self-signed bootstrap cert. The nginx image substitutes ${DOMAIN} in
+# /etc/nginx/templates/*.template at startup (limited to DOMAIN via the filter).
+RUN apk add --no-cache openssl
+COPY --from=build /app/dist /usr/share/nginx/html
+COPY default.conf.template /etc/nginx/templates/default.conf.template
+COPY docker-entrypoint.d/10-selfsigned.sh /docker-entrypoint.d/10-selfsigned.sh
+COPY docker-entrypoint.d/30-cert-watch.sh /docker-entrypoint.d/30-cert-watch.sh
+RUN chmod +x /docker-entrypoint.d/10-selfsigned.sh /docker-entrypoint.d/30-cert-watch.sh
+EXPOSE 80 443