v0.1.17: UI fixes, Linux improvements, documentation overhaul

UI/UX:
- Fix heartbeat auto-refresh and rate-limiting page
- Add navigation breadcrumbs to settings pages
- New screenshots added

Linux Agent v0.1.17:
- Fix disk detection for multiple mount points
- Improve installer idempotency
- Prevent duplicate registrations

Documentation:
- README rewrite: 538→229 lines, homelab-focused
- Split docs: API.md, CONFIGURATION.md, DEVELOPMENT.md
- Add NOTICE for Apache 2.0 attribution

aggregator-server/Dockerfile

@@ -1,18 +1,44 @@
-FROM golang:1.23-alpine AS builder
+# Stage 1: Build server binary
+FROM golang:1.23-alpine AS server-builder
 
 WORKDIR /app
-COPY go.mod go.sum ./
+COPY aggregator-server/go.mod aggregator-server/go.sum ./
 RUN go mod download
 
-COPY . .
+COPY aggregator-server/ .
 RUN CGO_ENABLED=0 go build -o redflag-server cmd/server/main.go
 
+# Stage 2: Build agent binaries for all platforms
+FROM golang:1.23-alpine AS agent-builder
+
+WORKDIR /build
+# Copy agent source code
+COPY aggregator-agent/ ./
+
+# Build for Linux amd64
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o binaries/linux-amd64/redflag-agent cmd/agent/main.go
+
+# Build for Linux arm64
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build -o binaries/linux-arm64/redflag-agent cmd/agent/main.go
+
+# Build for Windows amd64
+RUN CGO_ENABLED=0 GOOS=windows GOARCH=amd64 go build -o binaries/windows-amd64/redflag-agent.exe cmd/agent/main.go
+
+# Build for Windows arm64
+RUN CGO_ENABLED=0 GOOS=windows GOARCH=arm64 go build -o binaries/windows-arm64/redflag-agent.exe cmd/agent/main.go
+
+# Stage 3: Final image with server and all agent binaries
 FROM alpine:latest
 
 RUN apk --no-cache add ca-certificates tzdata
 WORKDIR /app
 
-COPY --from=builder /app/redflag-server .
+# Copy server binary
+COPY --from=server-builder /app/redflag-server .
+COPY --from=server-builder /app/internal/database ./internal/database
+
+# Copy all agent binaries
+COPY --from=agent-builder /build/binaries ./binaries
 
 EXPOSE 8080