doc: Document the new dependency

CHANGELOG.md

@@ -15,6 +15,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 
 - JSON API: `txprepare` now uses `outputs` as parameter other than `destination` and `satoshi`
+- Build: Now requires [`gettext`](https://www.gnu.org/software/gettext/)
 
 ### Deprecated
 

Dockerfile

@@ -48,7 +48,7 @@ RUN mkdir /opt/litecoin && cd /opt/litecoin \
 FROM debian:stretch-slim as builder
 
 ENV LIGHTNINGD_VERSION=master
-RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates autoconf automake build-essential git libtool python python3 python3-mako wget gnupg dirmngr git
+RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates autoconf automake build-essential git libtool python python3 python3-mako wget gnupg dirmngr git gettext
 
 RUN wget -q https://zlib.net/zlib-1.2.11.tar.gz \
 && tar xvf zlib-1.2.11.tar.gz \

contrib/linuxarm32v7.Dockerfile

@@ -48,7 +48,7 @@ RUN mkdir /opt/litecoin && cd /opt/litecoin \
 FROM debian:stretch-slim as builder
 
 ENV LIGHTNINGD_VERSION=master
-RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates autoconf automake build-essential git libtool python python3 python3-mako wget gnupg dirmngr git \
+RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates autoconf automake build-essential gettext git libtool python python3 python3-mako wget gnupg dirmngr git \
   libc6-armhf-cross gcc-arm-linux-gnueabihf g++-arm-linux-gnueabihf
 
 ENV target_host=arm-linux-gnueabihf

contrib/linuxarm64v8.Dockerfile

@@ -48,7 +48,7 @@ RUN mkdir /opt/litecoin && cd /opt/litecoin \
 FROM debian:stretch-slim as builder
 
 ENV LIGHTNINGD_VERSION=master
-RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates autoconf automake build-essential git libtool python python3 python3-mako wget gnupg dirmngr git \
+RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates autoconf automake build-essential gettext git libtool python python3 python3-mako wget gnupg dirmngr git \
   libc6-arm64-cross gcc-aarch64-linux-gnu g++-aarch64-linux-gnu
 
 ENV target_host=aarch64-linux-gnu

doc/INSTALL.md

@@ -37,7 +37,7 @@ Get dependencies:
     sudo apt-get install -y \
       autoconf automake build-essential git libtool libgmp-dev \
       libsqlite3-dev python python3 python3-mako net-tools zlib1g-dev libsodium-dev \
-      git
+      git gettext
 
 If you don't have Bitcoin installed locally you'll need to install that
 as well:
@@ -84,6 +84,7 @@ $ sudo dnf update -y && \
                 'Development Tools' && \
         sudo dnf install -y \
                 clang \
+                gettext \
                 git \
                 gmp-devel \
                 libsq3-devel \
@@ -135,7 +136,7 @@ OS version: FreeBSD 11.1-RELEASE or above
 Get dependencies:
 
     # pkg install -y \
-      autoconf automake git gmp gmake libtool python python3 sqlite3 libsodium py36-mako bash
+      autoconf automake gettext git gmp gmake libtool python python3 sqlite3 libsodium py36-mako bash
 
 If you don't have Bitcoin installed locally you'll need to install that
 as well: