fix: simplify CI/CD and Dockerfile

- Use github.actor instead of gitea.actor
- Add act-latest container for Gitea Actions
- Simplify Dockerfile to use alpine
- Remove CGO dependencies
- Fix frontend build path

Dockerfile

@@ -1,38 +1,19 @@
 # 构建阶段
-FROM golang:1.22-bookworm AS builder
-
-# 安装构建依赖
-RUN apt-get update && apt-get install -y \
-    git \
-    gcc \
-    g++ \
-    make \
-    libopencv-dev \
-    && rm -rf /var/lib/apt/lists/*
+FROM golang:1.22-alpine AS builder
 
 WORKDIR /app
 
-# 复制 Go 模块文件
-COPY go.mod ./
-
 # 复制源代码
 COPY . .
 
-# 下载依赖
+# 构建
 RUN go mod download || true
-
-# 构建（纯 Go 版本，暂不启用 CGO）
 RUN CGO_ENABLED=0 GOOS=linux go build -ldflags="-s -w" -o anticaptcha ./cmd/server
 
 # 运行阶段
-FROM debian:bookworm-slim
+FROM alpine:3.20
 
-# 安装运行时依赖
-RUN apt-get update && apt-get install -y \
-    ca-certificates \
-    tzdata \
-    libgomp1 \
-    && rm -rf /var/lib/apt/lists/*
+RUN apk add --no-cache ca-certificates tzdata
 
 WORKDIR /app
 
@@ -40,7 +21,7 @@ WORKDIR /app
 COPY --from=builder /app/anticaptcha .
 COPY --from=builder /app/web/dist ./web/dist
 
-# 创建数据目录
+# 创建目录
 RUN mkdir -p /app/data /app/models
 
 ENV GIN_MODE=release