Update ftl-build container to Alpine 3.22 released yesterday

Signed-off-by: DL6ER <[email protected]>

Author: DL6ER

ftl-build/Dockerfile

@@ -1,4 +1,4 @@
-ARG CONTAINER="alpine:3.21"
+ARG CONTAINER="alpine:3.22"
 FROM ${CONTAINER} AS builder
 
 ARG TARGETPLATFORM
@@ -13,6 +13,7 @@ RUN apk add --no-cache \
         bind-tools \
         curl \
         gmp-dev \
+        gmp-static \
         libcap \
         linux-headers \
         openssh-client \
@@ -43,8 +44,8 @@ RUN apk add --no-cache \
         ncurses \
         py3-dnspython
 
-ENV STATIC true
-ENV TEST true
+ENV STATIC=true
+ENV TEST=true
 
 # As of Alpine 3.21 (Dec 2024), we need to patch the termcap library to include
 # the standard headers as well as unistd.h for the write function