Update Dockerfile

Dockerfile

@@ -2,7 +2,17 @@ FROM golang:1.24 AS builder
 
 RUN git clone https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake.git /snowflake && \
     cd /snowflake && \
-    go build -o /usr/local/bin/snowflake-proxy ./cmd/proxy
+    echo "=== Directory listing ===" && \
+    ls -la && \
+    echo "=== CMD folder ===" && \
+    ls -la cmd/ 2>/dev/null || echo "No cmd folder" && \
+    echo "=== Looking for main packages ===" && \
+    find . -name "main.go" | head -10 && \
+    echo "=== Building... ===" && \
+    go build -o /usr/local/bin/snowflake-proxy ./cmd/snowflake-proxy || \
+    go build -o /usr/local/bin/snowflake-proxy ./cmd/proxy || \
+    go build -o /usr/local/bin/snowflake-proxy ./proxy || \
+    echo "Build failed - no main found"
 
 FROM ubuntu:22.04