fix: cors and sse for logs (#1284)

Co-authored-by: Reece Williams <reecepbcups@gmail.com>

Dockerfile.local-interchain

@@ -21,12 +21,20 @@ RUN cd local-interchain && make build
 
 RUN mv ./bin/local-ic /go/bin
 
-# Reduces the size of the final image from 7GB -> 0.1GB
-FROM busybox:1.35.0 AS final
+# Final stage
+FROM debian:bookworm-slim AS final
+
+# Install certificates and required libraries
+RUN apt-get update && \
+    apt-get install -y ca-certificates libc6 && \
+    update-ca-certificates && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
+
 RUN mkdir -p /usr/local/bin
 COPY --from=builder /go/bin/local-ic /usr/local/bin/local-ic
 
 EXPOSE 8080
 
 # Run
-CMD ["local-ic"]
+CMD ["local-ic"]

local-interchain/interchain/handlers/log_stream.go

@@ -73,7 +73,7 @@ func (ls *LogStream) StreamLogs(w http.ResponseWriter, r *http.Request) {
 			line, err := reader.ReadString('\n')
 			if err == nil {
 				// Send the log line to the client
-				fmt.Fprintf(w, "%s\n", line)
+				fmt.Fprintf(w, "data: %s\n\n", line)
 				flusher.Flush() // Send to client immediately
 			} else {
 				// If no new log is available, wait for a short period before retrying

local-interchain/interchain/start.go

@@ -279,7 +279,7 @@ func StartChain(installDir, chainCfgFile string, ac *types.AppStartConfig) {
 		// Where ORIGIN_ALLOWED is like `scheme://dns[:port]`, or `*` (insecure)
 		corsHandler := handlers.CORS(
 			handlers.AllowedOrigins([]string{"*"}),
-			handlers.AllowedHeaders([]string{"*"}),
+			handlers.AllowedHeaders([]string{"Content-Type", "Authorization", "Accept"}),
 			handlers.AllowedMethods([]string{"GET", "HEAD", "POST", "PUT", "OPTIONS", "DELETE"}),
 			handlers.AllowCredentials(),
 			handlers.ExposedHeaders([]string{"*"}),