Fix dockerfile, fix error if symbolic link already exists (#298)

Dockerfile

@@ -12,7 +12,6 @@ WORKDIR /build
 # Copy and download caminogo dependencies using go mod
 COPY go.mod .
 COPY go.sum .
-COPY dependencies dependencies/
 RUN go mod download
 
 # Copy the code into the container

scripts/build_camino.sh

@@ -55,7 +55,7 @@ mkdir -p $plugin_dir
 
 # Exit build successfully if the binaries are created
 if [[ -f "$caminogo_path" ]]; then
-    ln -s caminogo $camino_node_symlink_path
+    ln -sf caminogo $camino_node_symlink_path
     echo "Build Successful"
     exit 0
 else