curl fix

Dockerfile

@@ -5,7 +5,7 @@ RUN apt-get -y update && \
     apt-get -y upgrade && \
     apt-get -y install build-essential pkg-config libc6-dev m4 g++-multilib autoconf libtool ncurses-dev \
     unzip python zlib1g-dev wget bsdmainutils automake libssl-dev libprotobuf-dev \
-    protobuf-compiler libqrencode-dev libdb++-dev software-properties-common libcurl4-openssl-dev && \
+    protobuf-compiler libqrencode-dev libdb++-dev software-properties-common libcurl4-openssl-dev curl && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*