Serveur Go : recherche GitHub par critères

- /api/search traduit les filtres en requête GitHub (langage, étoiles,
  activité, création, licence, topic, forks, archivés, good first issues)
- cache mémoire des recherches identiques (CACHE_TTL) et suivi du quota
- /api/status, /healthz, authentification basique optionnelle
- Dockerfile et docker-compose.yml

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

Dockerfile

@@ -0,0 +1,19 @@
+# Image versions are pinned: update them on purpose.
+
+# ---- Build ----
+FROM golang:1.27.1-alpine3.24 AS build
+WORKDIR /src
+COPY go.mod ./
+COPY *.go ./
+COPY web ./web
+RUN CGO_ENABLED=0 go build -trimpath -ldflags="-s -w" -o /out/searchgit .
+
+# ---- Final image ----
+FROM alpine:3.24.2
+RUN apk add --no-cache ca-certificates \
+ && adduser -D -H -u 10001 searchgit
+COPY --from=build /out/searchgit /usr/local/bin/searchgit
+USER searchgit
+EXPOSE 8080/tcp
+HEALTHCHECK --interval=30s --timeout=3s CMD wget -qO- http://127.0.0.1:8080/healthz || exit 1
+ENTRYPOINT ["/usr/local/bin/searchgit"]