refactor(deploy): consolidate configuration and reorganize docker files

docker/Dockerfile.server

@@ -0,0 +1,31 @@
+FROM golang:1.25-alpine AS builder
+
+WORKDIR /build
+
+RUN apk add --no-cache git make
+
+COPY go.mod go.sum ./
+RUN go mod download
+
+COPY . .
+
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 \
+    go build -trimpath -ldflags "-s -w" \
+    -o memoh-server ./cmd/agent/main.go
+
+FROM alpine:latest
+
+WORKDIR /app
+
+RUN apk add --no-cache ca-certificates tzdata wget
+
+COPY --from=builder /build/memoh-server /app/memoh-server
+
+RUN mkdir -p /var/lib/memoh/data
+
+EXPOSE 8080
+
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+    CMD wget --no-verbose --tries=1 --spider http://localhost:8080/health || exit 1
+
+CMD ["/app/memoh-server"]