Add slug support and new admin features

backend/Dockerfile

@@ -1,15 +1,15 @@
-FROM golang:1.22-alpine AS build
-WORKDIR /app
-COPY . .
-RUN go build -o server ./main.go
-
-FROM alpine:3.20
-WORKDIR /app
-# HTTPS for /img/clean proxy requires CA bundle
-RUN apk add --no-cache ca-certificates \
-    && update-ca-certificates
-# Optional: timezone data for precise Prague time
-# RUN apk add --no-cache tzdata
-COPY --from=build /app/server /app/server
-EXPOSE 8080
-ENTRYPOINT ["/app/server"]
+FROM golang:1.22-alpine AS build
+WORKDIR /app
+COPY . .
+RUN go build -o server ./main.go
+
+FROM alpine:3.20
+WORKDIR /app
+# HTTPS for /img/clean proxy requires CA bundle
+RUN apk add --no-cache ca-certificates \
+    && update-ca-certificates
+# Optional: timezone data for precise Prague time
+# RUN apk add --no-cache tzdata
+COPY --from=build /app/server /app/server
+EXPOSE 8080
+ENTRYPOINT ["/app/server"]