OP#176 edit Dockerfile go mod step

Dockerfile

@@ -8,7 +8,10 @@ WORKDIR /src
 # Copy your local source (you already have it)
 COPY . .
 
-# Build the binary — just "make" is enough (default target = all)
+# fix go mod
+RUN go mod tidy
+
+# Build the binary
 RUN make
 
 # Verify it was built