feat(client): Support predefined tunnel configuration and management commands

Added predefined tunnel functionality, allowing users to define multiple tunnels in the configuration file and start them by name, including the following improvements:
- Added --all flag to start all configured tunnels
- Added parameterless start command to list available tunnels
- Support configuration of multiple tunnel types (http, https, tcp)
- Support advanced configurations such as subdomains, transport protocols, and IP allowlists

refactor(deployments): Refactor Docker deployment configuration

Removed old Dockerfile and Compose configurations, added new deployment files:
- Removed .env.example and old Docker build files
- Added Caddy reverse proxy configuration file
- Added two deployment modes: standard and Caddy reverse proxy
- Added detailed server configuration example files

docs: Update documentation to include tunnel configuration and deployment guide

Updated Chinese and English README documents:
- Added usage instructions and configuration examples for predefined tunnels
- Expanded server deployment section to include direct TLS and reverse proxy modes
- Added server configuration reference table with detailed configuration item descriptions
- Added specific configuration methods for Caddy and Nginx reverse proxies

deployments/Dockerfile.server

@@ -0,0 +1,48 @@
+# =========================
+# Builder stage
+# =========================
+FROM golang:1.25-alpine AS builder
+
+RUN apk add --no-cache ca-certificates tzdata
+
+WORKDIR /app
+COPY go.mod go.sum ./
+RUN go mod download
+
+COPY . .
+
+# Version passed from build args
+ARG VERSION=dev
+
+# Buildx injects these automatically for multi-arch builds
+ARG TARGETOS
+ARG TARGETARCH
+
+RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH:-amd64} \
+    go build -trimpath \
+    -ldflags "-s -w -X main.version=${VERSION}" \
+    -o /app/bin/drip \
+    ./cmd/drip
+
+# =========================
+# Runtime stage
+# =========================
+FROM alpine:latest
+
+RUN apk add --no-cache ca-certificates tzdata && \
+    update-ca-certificates
+
+WORKDIR /app
+
+COPY --from=builder /etc/ssl/certs /etc/ssl/certs
+COPY --from=builder /usr/share/zoneinfo /usr/share/zoneinfo
+COPY --from=builder /app/bin/drip /app/drip
+
+RUN addgroup -S drip && adduser -S -G drip drip && \
+    mkdir -p /app/data/certs && \
+    chown -R drip:drip /app
+
+USER drip
+
+ENTRYPOINT ["/app/drip"]
+CMD ["server", "-c", "/app/config.yaml"]