feat(web): show build info and theme menu [CI]

server/Dockerfile

@@ -5,6 +5,12 @@ COPY packages/core/package.json ./packages/core/package.json
 RUN cd web && npm ci --no-audit --no-fund
 COPY packages/core/ ./packages/core/
 COPY web/ ./web/
+ARG WEBDROP_BUILD_COMMIT=unknown
+ARG WEBDROP_BUILD_TAG=unknown
+ARG WEBDROP_BUILD_TIME=unknown
+ENV WEBDROP_BUILD_COMMIT=$WEBDROP_BUILD_COMMIT \
+    WEBDROP_BUILD_TAG=$WEBDROP_BUILD_TAG \
+    WEBDROP_BUILD_TIME=$WEBDROP_BUILD_TIME
 RUN npm run build --prefix web
 
 FROM mcr.microsoft.com/dotnet/sdk:10.0-noble-aot AS build